When you fall asleep, your lower jaw can relax backward, narrowing the space behind your tongue where snoring vibration begins.
Nasal strips only target your nose. DIFINEY gently holds your lower jaw forward, creating more room for airflow and helping reduce the vibration behind snoring.
Sleep Specialist Reviewed
“Gently advances the jaw to support airflow and nighttime comfort.”
Emmett Lynch
Adult sleep and snoring specialist
02
You Didn’t Choose to Snore.But It’s Costing You Both Sleep.
One of you snores. The other lies awake or moves to the couch. By morning, you’re both tired.
But you don’t have to accept this as normal.
03
Your Jaw Isn’t One‑Size‑Fits‑All.Your Mouthpiece Shouldn’t Be Either.
A fixed setting may move your jaw too little or too far forward.
DIFINEY gives you 1 to 6 mm of adjustment.Start at just 1 mm, then move forward gradually with your thumb until you find the lowest comfortable setting that helps reduce your snoring.
No tools needed. Just adjust it with your thumb.
04
60 Seconds.Made to Stay Put All Night.
DIFINEY softens in boiling water and molds around your upper and lower teeth. Your tooth impressions create a closer, more secure hold.
90%
reported a more comfortable and secure fit*
Compared with an unmolded mouthpiece.
*Based on an internal customer survey comparing molded vs. unmolded mouthpieces. Individual results may vary.
Mold It at Home in Minutes
4 simple steps
1
HEAT
40 sec
Soften it in boiling water.
2
BITE
10 sec
Bite down firmly to mold it to your teeth.
3
COOL
30 sec
Dip it in cool water to lock the shape.
⚠ Then dry it — it MUST be 100% dry.
4
WEAR
Adjust your setting and go to sleep.
First fit not quite right? Reheat and remold up to 3 times.
05
Comfortable Enough to Wear All Night?DIFINEY Customers Say Yes.
A mouthpiece only works if you can comfortably keep it in throughout the night. Here is what DIFINEY customers say:
Lydia L.
✓ Verified Purchase
★★★★★
Easy to use
“Kind of just feels like you’re wearing a retainer. It doesn’t feel uncomfortable or gag inducing at all.”
Omarious
✓ Verified Purchase
★★★★★
Comfy enough to wear all night
“After little tweaking, the adjustable fit is fantastic and comfy enough to wear all night... my snoring has changed from freight train to calm breeze. I wake up feeling more rested too.”
Whitney
✓ Verified Purchase
★★★★★
Game-changer for better sleep
“It’s comfortable to wear, easy to adjust, and most importantly, it works! My partner says I barely snore anymore, and I wake up feeling so much more rested.”
Review excerpts. Individual results vary.
06
You Wear It for Hours.DIFINEY Is FDA‑Cleared and BPA‑Free.
Physician-recommended
FDA Cleared
BPA Free
Dentist Recommended
Dr. Derek M Cornetta
DDS, FAGD
DIFINEY 4.0 is an FDA-cleared over-the-counter anti-snoring mouthpiece made with BPA-free materials. Its design has also been reviewed by dental and sleep professionals.
07
Try It for 90 Nights.Money Back Even After You Mold It.
If your partner doesn’t notice quieter nights, request a refund within 90 days of delivery — EVEN AFTER MOLDING.
You do not have to decide from a product photo. You can decide after trying it.
Difiney 4.0: Stop Snoring with a Custom Fit You Can Adjust®
Difiney 4.0 adjusts to you. It guides your jaw forward to keep your airway open. Built to silence snoring.
“It’s so comfortable, you’ll barely notice it’s there.”
BUNDLE & SAVE
1 DEVICE$49.98per deviceSave $29.99
MOST POPULAR2 DEVICES$43.99per deviceSave $111.94
BEST PRICE3 DEVICES$39.99per deviceSave $159.91
DIFINEY 4.0 · 2 Devices
$43.99/per device$59.98
Total$87.98
Free U.S. Shipping
FDA Cleared
BPA-Free
🎁 OCTOBER SALE 🎁
The more you buy, the more you unlock
FREE $6.99Free U.S. Shipping
FREE $19.991Protective Case
FREE $19.992Protective Case
FREE $19.993Protective Case
+
FREE $39.98Ultrasonic Cleaner
90-Day Money-Back Guarantee
Not happy? Get a full refund — even after molding.
Secure Checkout
Why 200,000 Customers Choose DIFINEY
Real stories from customers who found quieter, more comfortable sleep.
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
★★★★★
0:00 / 0:00
DIFINEY 4.0 Advanced Anti Snoring Mouthpiece-v5 - 1 Device$49.98$59.98
0:00 / 0:00
What DIFINEYUsers Say.
4.7
★★★★★
521 reviews
5 ★438
4 ★47
3 ★17
2 ★12
1 ★7
Whitney
Verified Purchase
★★★★★1 year ago
Game-changer for better sleep
I was honestly skeptical at first, but the Difiney Advanced Anti-Snoring Device 4.0 has completely exceeded my expectations. After trying several other solutions with no real results, this device finally delivered. It’s comfortable to wear, easy to adjust, and most importantly, it works — my partner says I barely snore anymore.
Mike
Verified Purchase
★★★★★10 months ago
Im alive !!!
My wife doesn’t want to murder me anymore. Its great!!!! In all seriousness im actually sleeping much better and waking up feeling way more refreshed.
Robert P.
Verified Purchase
★★★★★1 year ago
Effective item
I had the snoring issues from long time and tried several things but didn’t get much help. Then I ordered this device and it helped me a lot. After using it for a while and seeing how effective it is, I recommended it to my family and friends.
Kaylee V.
Verified Purchase
★★★★★12 months ago
Get better airflow and stop grinding teeth
This mouth guard designed to reduce snoring is very effective and easy to boil to fit custom to your mouth. This design created a barrier between the upper and lower teeth helping to prevent grinding and reduce damage. The positioning of the jaw promotes better airflow.
Lydia L.
Verified Purchase
★★★★★1 year ago
Easy to use
Great packaging. Very hygienic and user friendly. Kind of just feels like you’re wearing a retainer. It doesn’t feel uncomfortable or gag inducing at all.
Omarious
★★★★★1 year ago
The Snorer's Sleep Savior!
Before, I tried a number of snoring remedies, but this one works wonders. After little tweaking, the adjustable fit is fantastic and comfy enough to wear all night. Not mine, but my wife's, she claims that my snoring has changed from freight train to calm breeze. I wake up feeling more rested too. Definitely recommend to anyone struggling with snoring issues.
Sydney
★★★★★1 year ago
No more insomnia
My spouse snores like an absolute truck and I finally reached my breaking point. I decided to try this anti-snoring device and I'm so glad I did. It's easy to use and has even improved his breathing quality. The device works like a charm and my spouse no longer snores. I can finally sleep peacefully through the night without earplugs or separate rooms.
Kari
★★★★★1 year ago
Observing the Construction and Materials
These two anti-snoring mouthpieces arrived recently. Examining them closely, the materials appear to be a type of flexible plastic or silicone. This seems like a suitable choice for a device that comes into contact with the mouth. The molding looks clean and consistent, suggesting decent quality control. After using it for several nights, I can confirm it's well-made and effective at reducing snoring.
Zoom m.
Verified Purchase
★★★★☆10 months ago
It works be patient.
My apnea is almost completely gone since starting to use this. I awake more rested. It took about 2 weeks for my jaw to stop hurting but it no longer bothers me. Huge boost to my quality of life.
Katy
Verified Purchase
★★★★☆11 months ago
Forces mouth-breathing cut inside of my mouth
The seller reached out to me and gave a full refund of this product (even though I had used it once). Since the customer service was fast and courteous, and I'm no longer out money on something I can't use, I added two stars. I still wouldn't use this product, but would recommend based on the excellent customer service alone. The device itself forced me to breathe through my mouth all night and unfortunately cut the inside of my mouth during use.
Anahy r.
Verified Purchase
★★★★★12 months ago
I recommend it!
This product is really effective for snoring. It's the first time I tried a product to help reduce snoring and I'm very happy with it.
Brayan
Verified Purchase
★★★★★1 year ago
Good
Don't push too hard on the adjustment. It will snap
Weiss
Verified Purchase
★★★★★1 year ago
Effective!
Comfortable and notable helps with my husband's snoring!!
Preston Y.
Verified Purchase
★★★★★1 year ago
Easy product and very effective.
Great product! It works great. It is easy to use and very effective.
Louus
★★★★★1 year ago
good so far
It's useful. Although my husband's snoring hasn't completely disappeared, it has improved a lot. It looks really small, but it actually fits well. It's more suitable for people with a smaller build.
Vigki
★★★★★1 year ago
Best purchase
Best purchase I've ever made. My husband snoring was preventing me from getting good rest at night. I bought this and it has stopped the snoring. I can't go a single night without it.
Jasmine D.
Verified Purchase
★★★★★1 year ago
Amazing!!!
I had my husband try this and it totally works. I can now get some sleep! Lol
Lae
Verified Purchase
★★★★★1 year ago
Comfortable and Effective
This device really makes a difference. It's easy to adjust, fits comfortably, and noticeably reduces snoring. A great solution for better sleep—for both me and my partner!
NE T.
Verified Purchase
★★★★★1 year ago
Excellent Anti-Snoring Device
I got this for my husband and it really makes a difference. Easy to use, comfortable at night, and has improved his rest.
Alaina
Verified Purchase
★★★★★10 months ago
No more snore
I was skeptical at first based on the appearance of this mouthguard, but it really does the job in reducing my snoring so that my wife can sleep peacefully.
S. H.
Verified Purchase
★★★★★12 months ago
Didn't work for me but company reached out and gave me my money back!!!
Regrettably this did not work for me. Within 10 minutes I had such pain in my jaw I couldn't continue having it in my mouth. No way to adjust it. So bummed wanted it to be my answer. I came to add that this company is wonderful and reached out to refund my money. I thought that was above and beyond and wanted to make sure people knew about their excellent customer service.
Shawn
Verified Purchase
★★★★★1 year ago
Works better than the blue version
I bought the blue version of Difiney anti snoring device last month and it worked well. When I saw this clear version, I decided to give it a try, it feels less bulky and more comfi than the blue one. Like it.
Aurora
★★★★★1 year ago
Super comfortable!
The anti-snore mouth guard is just what every snorer needs. It is super comfortable because it is made of soft, flexible material that fits snugly without causing discomfort throughout the night. Its design helps gently reposition the jaw to keep the airways open, reducing snoring effectively. I've been using it for a few weeks now and the results are impressive.
Hugo
★★★★★1 year ago
A Great Option for Snoring Relief
I wasn't sure how I'd feel about wearing something like this, but I'm glad I gave it a try! The mouthpiece is soft but strong and has a good grip, which helps keep my airway open while I sleep. The custom molding process was easy and quick. I'm getting better sleep, and it doesn't bother me at all anymore. Would definitely recommend to anyone dealing with snoring.
Fred
★★★★★1 year ago
Excellent Quality Easy to Use
This device is of excellent quality. The material feels premium, and it was very easy to mold. I like that it doesn't feel like it's forcing my jaw too far forward—just enough to keep my airway open. I've used it for a few nights now, and I can already tell the difference. My partner hasn't complained about my snoring once since I started using it.
Nancy
★★★★★1 year ago
Working good with us
My husband doesn't really snore before, but seems as he grows older, the snoring comes. I've tried a couple of different anti snoring devices, but few of them really works. This device is working with him! It's not uncomfortable to wear, and I can't really hear him snoring anymore. We're both very pleased with the results and would recommend it to others.
Jose L. V.
★★★★★1 year ago
A quiet companion on the journey
As a frequent traveler, this anti-snoring device has been a great help in hotels! I can breathe more easily after wearing it, which not only improves my sleep, but also prevents my snoring from disturbing others. The device is small and light, especially suitable for carrying on trips. It has become an essential part of my travel kit.
HH K.
★★★★★1 year ago
Quiet at night
This anti-snoring device has improved the sleep quality of my family and me. After wearing it, my breathing has become much smoother, the snoring has been significantly reduced, and there have even been several nights where I didn't snore at all. It is very easy to use, and the custom fit makes it comfortable. I'm very satisfied with this purchase.
Caligirl
Verified Purchase
★★★★★1 year ago
Good effect
This product really works! It's easy to fit and feels comfortable after a night or two. I noticed my snoring was much quieter right away. The material feels safe and high-quality. It took a little time to get used to, but now I sleep through the night without any issues. My family is grateful for the quieter nights.
CT
Verified Purchase
★★★★★1 year ago
Helps me sleep
I am not a big snorer. It typically only happens in some cases, like when I lie on my back or when I ate late. This product has been helpful for me. I can't speak for someone who snores loud all night every night, but it works for me. It is comfortable and seems to hold up well after several weeks of use.
Bootabs
Verified Purchase
★★★★★11 months ago
Better than the mask/machine!
This mouth guard is amazing. After spending hundreds of dollars on sleep apnea equipment, and not sleeping well with it, this works perfectly. It's comfortable and allows me to sleep soundly. No more dealing with complicated CPAP machines or uncomfortable masks. This simple device has been a game changer for my sleep quality and overall well-being. Best investment I've made for my health in a long time!
1223U
★★★★★1 year ago
It's integrated into my daily life
I tried this product so that both my wife and I could get a good night's sleep. I didn't have much hope, but it surprised me. It's still relatively comfortable, and you'll definitely notice wearing it, but it doesn't cut into my gums or push/pull my teeth in a painful way. After about a week of use it became part of my nightly routine. My snoring has reduced significantly and my wife is much happier.
kimber
Verified Purchase
★★★★☆11 months ago
Hard to fit but works!
Takes more time in hot water to get molded than stated. Not easy to adjust, but seems to work well once correctly fit.
James R.
Verified Purchase
★★★★☆11 months ago
Works!
Wife is a light sleeper and I'm a hard snorer. I was reluctant, but it has helped tremendously. No more waking me up to roll over! It does take some adjusting to the feeling of it in your mouth. It's kinda bulky, but depending on your comfort level and how hard you snore, it's definitely worth trying. The key is giving it a few nights to get used to the sensation.
Justin L.
Verified Purchase
★★★★★1 month ago
I’ve been using this mouthpiece for several months and it has improved the quality of my sleep significantly. Please do not stop making this model! Thank you so very much!
HB
★★★★★4 months ago
It works for me and helps with my obstructive breathing issues
The mouth gaurd is made to conform to your teeth. Simply put in hot water a bite down making it a custom fit. The lower portion adjusts your bottom jaw to bring it forward. I keep it at the two position. It lasts me approximately two months before I need to replace it. The plastic inner portion does accommodate for breathing through the mouth. The downside is that you are going to drool a bit and there's going to be an off feeling on your bite since you spent all night with the mouth gaurd in adjusting your jaw out of it's natural position. In my opinion and situation it was well worth it. I get better sleep, I've almost eliminated my obstructive breathing issues, and I don't have to wear a c pap on my face. It's approximate 30 dollar price tag is well worth it as for everything it's given back to me in sleep comfort.
Curtis.O
Verified Purchase
★★★★★5 months ago
Impressive so far
Here's my review so here is limited research. 3 days of studies lol First day no device 2nd image first night with device Lastly, night 2 with device and can tell significant changes. Still some noise as I sleep with fan on and the app records the hum of the fan... but over all impressed as of now. It's not very sexy but at least dont have to worry about waking up the neighborhood any more lmao
Alexandra
★★★★★1 year ago
Good choice
This anti snoring mouthpiece is cleverly designed to gently adjust the jaw position, improve airflow, and help my dad sleep more soundly. It's very simple to use. Just put it on before bed and you can feel the improvement immediately. There are no complicated settings or uncomfortable straps, so it's very easy to use. The mouthpiece can also be adjusted to my dad's needs without feeling uncomfortable.
sam
★★★★★1 year ago
Compact box make it perfect for travel
My wife start to use the Advanced Anti-Snoring Device recently. It make a difference in her sleep quality. The device wear comfortable. It come in a storage box. The box keep it clean and secure. she impressed by how effective it is in reducing snoring. It is easy to set up. It do not feel intrusive. This make it simple for her nightly routine. The box design is compact. This make it perfect for travel. If you look for a reliable snoring solution, you should try this device!
Antonio.G
Verified Purchase
★★★★★4 months ago
First trying an anti snoring device
WARNING: Still in the early stages of my review and as of today I am only 2 days into using the product. Also, this is my first time using an anti snoring device. Product was shipped and packaged nicely. No issues with delivery. The device comes packaged with the anti snoring device, molding holder, travel case, instructions, warranty card and contact information, and packaging box. The instructions were easy to use and follow. The process of molding is the same process to mold a sports mouth guard. You can also remold the device up to 3 times maximum before needing to purchase a new device. The device seems durable and sturdy. Adjusting the device required a little playing around with as you need to make sure both sides are at the same alignment. You also need to make sure you are slightly pulling the lower guard as that is the guard pulling your lower jaw forward. Adjusting the device does require some patience as it’s easy to over adjust one side if the other is already adjusted. Comfort is a topic on its own. First and foremost, if you put the guard in before the mold proper fit will not be there (this is a given if you have experience with sports mouth guards). But depending on the size and width of your mouth you may notice that your teeth could be sitting on the edge of the device. Also, not all teeth may fit into the device. Once you go through the molding process you have the opportunity to better align the guard with your teeth. So far I have been wearing anywhere from 3 5 mins on day 1 and 15 20 mins on day 2. It is recommended that you wear the device at least 10 mins before bed time to help get you accustomed to the product. Drooling and dry lips are possible as I have experienced this. I’ve had to use chapstick to reduce the dryness. Regards to drooling with the device, my natural reaction was to swallow the saliva but I noticed I’m more inclined to bit down on the device. There is a slight discomfort at first but the more you build yourself towards sleeping with it then it seems there is a higher success rate. I’ll update my review when I sleep with it.
Barry.I
Verified Purchase
★★★★★4 months ago
First one that works!!!!!!
I’ve tried many different products to stop my snoring. This is the FIRST mouthpiece that works. My wife is so happy because we can sleep together again. And it saves my heart from depriving me of oxygen, eliminating my snoring. I highly recommend it. Follow the directions exactly to get a personalized fit/imprint of your teeth. Cheers!
LARA
★★★★★1 year ago
easy to clean
I give it a quick rinse in the morning, and occasionally use a mild denture cleanser or mouthpiece cleaner to keep it fresh. Despite repeated usage and cleaning, the device has maintained its shape and clarity, showing that it’s built to last. It’s surprisingly discreet, too—once in place, it doesn’t stick out or make me feel self-conscious if I happen to be chatting with my partner before bed.
Avery.M
★★★★★1 year ago
Comfortable
This anti-snoring device is a solid option if you struggle with snoring. It’s easy to use, comfortable, and customizable to fit well. The material feels durable but soft enough not to hurt your mouth. After using it, the snoring seems to have reduced, and sleeping feels more restful. Adjusting it takes a little time, but once you get it right, it’s straightforward. Overall, it’s a good product.
Shawn
Verified Purchase
★★★★★4 months ago
It works well for us
It works just as well as before. It helped reduce my snoring at night, and I'm buying this one for my wife. Now both of us can sleep much better.
Daniel.N
Verified Purchase
★★★★★4 months ago
Marriage Saver!
This is the wife reviewing… my husband has been wearing this for a couple of months. It works so well! I can sleep in the same bed with him again. 😜 It helps with apnea and snoring.
Bella.U
Verified Purchase
★★★★★4 months ago
Worth a try
Works good, my wife has quit yelling at me and I feel much more rested.
Melanie.B
Verified Purchase
★★★★★4 months ago
I was skeptical
I was so skeptical that this would work but it absolutely does and I’m able to sleep so much better now he's not snoring!!
Kevin.H
Verified Purchase
★★★★★5 months ago
Very effective stop snoring device
I have had a sore jaw after using this for a few days which should resolve at some point, but the thing makes me stop snoring, period. I’m glad I found it and so is my fiancé!
Noah.N
Verified Purchase
★★★★★5 months ago
Works great!
So easy to use! The directions and the QR code for the YouTube video were so helpful and I’m finally sleeping through the night and not waking up fro snoring! Love it!
Noah.Q
Verified Purchase
★★★★★5 months ago
Anti snore device
So, after i had technical difficulties in the beginning I am so pleased i slept really good last night without any snoring, Thankyou
Frequently Asked Questions
Fit, Adjustment, Results, Shipping & More.
What's the difference between DIFINEY 2.0 and DIFINEY 4.0?
Both DIFINEY 2.0 and DIFINEY 4.0 use a boil-and-bite process to create a custom fit. The main differences are their profile, adjustment rail, adjustment range and molding material.
Profile: DIFINEY 4.0 has a more compact shape without the protruding side section of the original 2.0 design, giving it a less bulky profile.
Adjustment rail: DIFINEY 4.0 uses a redesigned rail for smoother sliding when adjusting the jaw position. DIFINEY 2.0 uses the original rail design.
Adjustment range: DIFINEY 2.0 adjusts from 1–4 mm, while DIFINEY 4.0 adjusts from 1–6 mm. The 4.0 range extends 2 mm further, giving you more room to personalize your setting.
Molding material: DIFINEY 4.0 uses an upgraded heat-moldable material designed to fit more closely to your teeth and bite. DIFINEY 2.0 uses the original molding material.
Both models require molding to your teeth. Follow the fitting and adjustment instructions for the model you choose.
Do anti-snoring mouthpieces actually work?
They can, depending on what is causing the snoring. Mandibular advancement mouthpieces hold the lower jaw slightly forward while you sleep. That can create more room in the upper airway and reduce the tissue vibration that makes the snoring sound. Oral appliances are an established option for adult primary snoring, but no single solution works for every type of snoring.
How does moving the lower jaw forward help reduce snoring?
When you fall asleep, the muscles around your tongue and throat relax. In some people, that makes the airway narrower. Holding the lower jaw slightly forward can create more space behind the tongue, so air moves through with less turbulence and less soft-tissue vibration. That is the basic idea behind mandibular advancement devices such as DIFINEY.
Does snoring mean I have sleep apnea?
No. Plenty of people snore without having sleep apnea. But loud, frequent snoring can also be a sign of obstructive sleep apnea, especially if it comes with breathing pauses, gasping or choking, morning headaches, or strong daytime sleepiness. If you notice those signs, it is worth getting checked by a healthcare professional.
Can DIFINEY treat sleep apnea?
No. DIFINEY 4.0 is designed to help reduce snoring. It is not intended to diagnose, treat, or cure sleep apnea. If you think you may have obstructive sleep apnea, get evaluated rather than assuming an over-the-counter snoring mouthpiece is enough. Oral appliances can be used clinically for some people with diagnosed OSA, but that is a separate treatment pathway with professional diagnosis and follow-up.
What if I'm still snoring while wearing DIFINEY?
First, check the fit and make sure the device is sitting securely. Then give your current adjustment a few nights if it still feels comfortable. If snoring continues, you can increase the advancement gradually according to the adjustment guide. Do not jump straight to the maximum setting. Congestion, alcohol, sleep position, weight changes, and other airway factors can also affect snoring. If snoring stays loud or comes with breathing pauses or gasping, talk with a healthcare professional.
What adjustment setting should I start with?
Start with the lowest comfortable setting. More advancement is not automatically better. The goal is to find the smallest amount of forward movement that helps reduce your snoring while still feeling comfortable enough to wear through the night. DIFINEY 4.0 gives you a 1–6 mm adjustment range so you can work up gradually instead of being locked into one position.
How do I know when to increase the adjustment?
Give each setting a few nights if it feels comfortable. If you are still snoring and your jaw is adapting well, move forward gradually according to the guide. If jaw or tooth soreness is increasing, back off instead of pushing farther. The goal is not to reach 6 mm — it is to find the lowest comfortable setting that helps.
How do I know if my DIFINEY fit is right?
It should feel secure, but not painfully tight. The mouthpiece should not easily slip off your teeth, create sharp pressure points, feel obviously uneven, or make breathing feel restricted. If it feels loose or uncomfortable after molding, it is better to remold it than try to sleep through a bad fit.
What if I don't get the mold right the first time?
That is okay. DIFINEY 4.0 can be reheated and remolded up to three times. If the first fit feels loose, uneven, or uncomfortable, follow the fitting steps again rather than forcing yourself to use it. Be careful not to overheat the device, and follow the temperature and timing instructions each time.
What if my mouthpiece feels loose or falls out while I sleep?
Check the mold first. A boil-and-bite mouthpiece needs enough retention to stay seated on your teeth during normal sleep. If it keeps slipping out, remold it carefully before changing the jaw setting. Do not use extra advancement just to make the device feel tighter. If you still cannot get a secure, comfortable fit, contact support.
How long does it take to get used to DIFINEY?
It can feel unfamiliar at first because your jaw is being held in a new position. Many people need a few nights to get used to the fit and find the setting that feels right. Start conservatively and give your mouth and jaw time to adjust. Mild unfamiliarity is one thing; ongoing or increasing pain is not something you should simply push through.
Is jaw or tooth soreness normal at first?
A little temporary soreness can happen while your jaw gets used to a new position. Oral appliances can also cause tooth or gum soreness in some users. What you should not ignore is strong pain, pain that keeps getting worse, or pain that does not settle after you remove the device. If that happens, stop using it and speak with a dentist or healthcare professional before trying again.
Can I breathe through my mouth while wearing DIFINEY?
Many users can still breathe through their mouth while wearing DIFINEY. The device is designed to reposition the lower jaw, not seal the mouth shut. If breathing feels restricted, uncomfortable, or different in a way that concerns you, remove the device and do not keep using it just to ‘get used to it.’
Can I use DIFINEY with braces, dentures, crowns, or implants?
DIFINEY is not recommended with braces or full dentures. If you have crowns, implants, bridges, missing teeth, loose teeth, recent dental work, or partial dental appliances, the answer depends on how stable your teeth and dental work are. Check with your dentist before molding the device if you are unsure.
How long does shipping take?
U.S. shipping is free. Orders typically ship from our St. Louis warehouse within 1–2 business days and arrive within 3–5 business days after shipping. Tracking is provided once your order is on the way.
Can I return DIFINEY after I've molded or tried it?
Yes. The 90-day trial is there so you can actually fit and try DIFINEY at home. If it is not right for you, you can request a return or exchange within the trial period. Follow the current return instructions on the site or contact support so the team can help with the next step.
What if my DIFINEY arrives damaged or has a quality issue?
Contact DIFINEY support with your order number and a photo or video of the issue if possible. Eligible manufacturing defects, molding issues, device failure under normal use, or items damaged on arrival may qualify for a replacement under the current warranty terms.
Ready forQuieter Nights?
Mold it to your teeth. Adjust it with your thumb. Decide in 90 days.