LIMITED-TIME BUNDLE SAVINGS
SAVE UP TO $59.96
STOP THE SNORING.
GET YOUR NIGHTS BACK.
Mold it to your bite. Adjust it for comfort. Try it for 90 nights—starting at $49.98.
Custom Fit
Molds to your bite
1–6 mm
Precision adjustable
FDA Cleared
No prescription needed
90-Day Money-Back Guarantee
Returns Accepted Even After Molding
Ships from St. Louis
6 Reasons People
Choose Difiney 4.0
01
Nasal Fixes Didn't Work?
Look at the Jaw.
For some snorers, the lower jaw relaxes backward during sleep, narrowing the space behind the tongue. DIFINEY gently holds the jaw slightly forward to create more room for airflow and help reduce the vibration behind snoring.
02
Molded to Your Teeth.
Designed to Stay Put.
Your teeth create the fit—not a one-size-fits-all tray.
A closer mold helps the mouthpiece sit more securely and reduce shifting while you sleep.
03
Why It Looks Thicker:
The Adjustment Is Built In.
The built-in adjustment rail lets you move the jaw position from 1–6 mm—without screws or tools. DIFINEY is designed to reposition the lower jaw—not seal the mouth shut. Many users can still breathe through their mouth while wearing it.
04
First Fit Not Right?
Remold It Up to 3×.
If the fit feels loose, uneven or uncomfortable, simply reheat and try again—up to three times, without buying another device.
05
Start at 1 mm.
Adjust Only If Needed.
Start at the lowest setting and give your jaw a few nights to adapt. If you're still snoring and the setting feels comfortable, increase gradually. Most users settle between 2–4 mm.
The goal isn't 6 mm.
It's the lowest comfortable setting that helps reduce your snoring.
06
Mold It. Wear It.
Decide in 90 Days.
The 90-day Money-Back Guarantee gives you time to actually mold and wear DIFINEY at home. If it isn't right for you, request a return within 90 days—even after you've molded and tried it.
Not recommended with braces or full dentures. Check with your dentist before use if you have crowns, implants, bridges, loose teeth or recent dental work.
Physician-recommended
FDA Cleared
BPA Free
Quieter Nights
for Both of You.
Fewer nudges. Less frustration. Calmer mornings together.
LIMITED-TIME BUNDLE SALESNORE LESS. SAVE MORE.
LIMITED TIME SALE LIVE
Every DIFINEY 4.0 ships complete. Nothing else to buy.
Order Today and You'll Get:
- $39.99 each on the 3-pack— $119.98 total, you save $59.96
- 90-Day Money-Back Guarantee— even after it's molded and worn
- Free U.S. Shipping— ships from St. Louis, MO
- Protective Case— keeps it clean between nights
- Fitting Handle— makes the at-home mold easier
- Instruction Guide & Warranty Card— in every box
90-Day Money-Back Guarantee: If it's not right for you, request a full refund.
More Control.
Without the Premium Price.
The same goal. Less hardware.
FEATURES
DIFINEY 4.0
OTHER MOUTHPIECES
Starting Price
$49.98
$59.99–$199.95
Cost per Night
~$0.26
~$1.00
Molds to Your Own Teeth
✓
Some models only
Tool-Free Adjustment
✓
Some models only
Remold Up to 3×
✓
Not stated
FDA Cleared
✓
Varies
Based on publicly listed starting prices and product specs of comparable adjustable mouthpieces, September 2026.
What DIFINEY
Users Say.
★★★★★
“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.”
★★★★★
“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.”
★★★★★
“This mouth guard designed to reduce snoring is very effective and easy to boil to fit custom to your mouth. … The positioning of the jaw promotes better airflow.”
★★★★★
“Effective! Comfortable and notable helps with my husband’s snoring!!”
Questions People
Ask Before Buying.
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.
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.
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 it 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?
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 use it 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.
Can it 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.
Ready for
Quieter Nights?
Mold it to your teeth. Adjust it with your thumb. Decide in 90 days.
90-Day Money-Back Guarantee