Five things changed after Ney started wearing the R3. Only one of them was his jaw.
The starting point. Braces gave him a straight smile. "Nobody ever asked what else they moved." Straight teeth, and a bite doing the work quietly in the background.
What he'd tried. A custom guard. He asked his dentist why it wasn't helping, and the answer stuck with him: most guards are built to save your enamel, not to change what is happening with your bite.
The switch. The R3. Soft flat silicone, direct fit straight out of the case. No boiling, no moulding, no impressions and no lab. "It's mechanical support for the bite you already have."
What changed. Five things he keeps coming back to: less brain fog, better sleep, more energy, posture opening up, and his teeth settling. His experience over nightly wear, not a promise.
Ney on the R3
Tap any clip to open it full screen with sound. Three clips, all his.
The R3, the guard he actually sleeps in
Worn while you sleep
Overnight, plus a few daytime hours if you want to move faster. No routine to learn.
Gentle, steady pressure
The flat-plane design supports the jaw without locking your bite, so it can settle where it should.
Ready out of the case
Premium soft silicone, food-grade tested. No boiling, no moulding, no impressions. Backed by a 1-year warranty.
How did the R3 help Ney?
The changes he comes back to most. His experience, not a promise.
Clearer days, more energy
The two he noticed first. Less brain fog through the afternoon, and more left in the tank at the end of the day.
Sleep that actually holds
The R3 is flat and vented, so his jaw is supported and his airway is not crowded. Better sleep is the one he credits the rest to.
Teeth settling, posture opening
He says his teeth are straightening and his posture is improving. "It's the first thing that's made the jaw feel steady, not shifted." That is what he describes after months of nightly wear, not a promise the R3 makes.
Three steps. All of them easy.
Take it out of the box and wash it
Wear it to sleep and 2–3 hours during the day
Wash it and let it dry
Confused about size? Measure your width.
One measurement decides it: the width across your back molars.

Width · molar to molar
| Size | Width, molar to molar |
|---|---|
| Medium | 50 mm or less |
| Large | 51 to 56 mm |
| XL | 57 mm or more |
Tips: use a crisp, firm apple, make sure your teeth are clean and dry, press down evenly, and measure carefully in millimetres. No apple? Cut a piece of cardboard to the shape of your upper arch, or measure the width of a current retainer.
Need help on how to measure?
Watch how to measure your palate size with the simple bite-and-bread method:
Consistency is the whole game
- Weeks 1-2: the adjustment phase. A little soreness or extra saliva is normal, your soft tissue is adapting, not a sign anything's wrong.
- Build up gradually: shorter daytime sessions first, then overnights. Ease off for a bit if it ever gets sharp.
- Over the months: the changes Ney talks about, clearer days, better sleep and easier posture, came from wearing it every night, not from wearing it harder. What he describes is his own experience, not a promise.
What people say about the R3
Questions, answered
How should I start? ›
Wearing it: the standard pattern is overnight plus 2 to 3 hours during the day. Build up gradually with shorter daytime intervals first. The early phase is the hardest and gets much easier after a few weeks.
Early discomfort: sore teeth, achy gums and extra saliva in the first weeks are the soft tissue adjusting, not a problem. Take breaks if it gets sharp, don't push through pain.
Faster results: consistency first, then simple stretches like Bite and Hold alongside the guard.
How does sizing work? ›
Width matters most. Measure the outer edges of your upper molars at their widest point, shown in this size guide.
Medium (46mm) fits teens and smaller mouths, Large (53.6mm) fits most adults, and XL (59.6mm) is for larger mouths.
Why does it work? ›
Think of the soft tissue over the skull like a balloon. Grinding your teeth down deflates it over time, what we tend to call "aging." Adding height back with gentle, consistent pressure runs the same physics in reverse.
How many people have done this? ›
Over 30,000 people have started using Reviv appliances and this method.
What is it made of, and what's included? ›
Premium soft silicone, food-grade tested. Your order is the R3 in your chosen size and colour, with its storage case and instructions, backed by a 1-year warranty.