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Fitting Instructions

How to Mold a Snoring Mouthpiece: VitalSleep Fitting Instructions

Fitting VitalSleep takes about five minutes at the kitchen sink. You heat it, bite into it, and it takes the shape of your own teeth. No dentist visit, no appointment, no waiting. Watch the video, then work through the four steps below.

Watch the full fitting process before you start.

Before you start

Get these three things ready. The molding window is short, so you want everything within arm's reach.

  • A mug of hot water and a separate bowl of cold water.
  • A timer on your phone. The seconds matter more than you would think.
  • Five uninterrupted minutes in front of a mirror.

Check this first

VitalSleep needs enough stable natural teeth to hold onto. It is not the right device for you if any of the following apply:

  • You wear braces or a retainer. It will not fit correctly over them.
  • You have full dentures, loose teeth, or advanced gum disease.
  • You have a dental implant less than one year old.
  • You have a large overbite.
  • You are under 18.

If you have crowns, bridges, partials, or implants, ask your dentist before you fit it. A full oral health assessment from your dentist or physician is the safest way to confirm VitalSleep is suitable for you.

1Step

Confirm your size

VitalSleep comes in two sizes. The women's size is about 10% smaller to fit smaller mouths more comfortably. Most men order the men's size and most women order the women's size.

Not sure? Take the 10-second fit quiz before you mold, because the fitting step is easier to get right when the tray is the correct size to begin with. Every mouthpiece ships with a protective travel case.

2Step

Mold it to your teeth

This is the part that makes the device yours. The trays soften in hot water, then set around your own bite as you press down.

  • Place the mouthpiece in hot water for 45 seconds.
  • Move it to cold water for 3 seconds so it is safe to put in your mouth.
  • Insert it and bite down firmly to press your teeth into both trays.
How to tell it worked. Take it out and look at it. You should see clear impressions of your upper and lower teeth in the trays. Put it back in and open your mouth slightly. A good fit stays seated rather than dropping away from your upper teeth.
If the fit is not right, do not force it. Email support@vitalsleep.com and we will send you a free replacement so you can try again.
3Step

Sleep in it flat for the first few nights

Do not advance the lower tray yet. For the first few nights, sleep with the device in its starting position and let your mouth get used to holding something while you sleep. Almost everyone needs a short adjustment period, and pushing the jaw forward on night one is the most common reason people give up early.

4Step

Advance the lower tray

Once you are comfortable wearing it, or if your snoring has not reduced, start moving the lower tray forward with the patented Accu-Adjust System and the included tool. Holding the lower jaw slightly forward is what helps keep the airway open.

  • Turn each screw clockwise to bring the lower tray forward. You can push the tray with your finger to guide it.
  • Set both sides to the same mark on the indicator. Uneven screws are the number one fitting mistake and they make the device feel crooked.
  • Advance in small increments over several nights rather than one large jump. Do not overadjust.
  • If your jaw or teeth feel sore, back the tray off and give it a night or two at the lower setting.

Common fitting questions

It came out of my mouth during the night

The teeth impressions are designed to hold it in place, but it can take a few nights to get used to sleeping with it. If your mouth tends to fall wide open while you sleep, any mouthpiece can come out. We will send you a free chin strap to help keep your mouth closed. Email support@vitalsleep.com to request one.

I cannot close my mouth all the way

Many people can close fully with VitalSleep in. If you have a smaller mouth, full closure may be limited. That is normal and it does not stop the device from working, since VitalSleep is designed so you can still breathe through your mouth if you need to.

My jaw or teeth are sore

Reduce the forward position of the lower tray first. Mild soreness during the adjustment period is common. Stop using it and contact your dentist if you have ongoing pain, tooth movement, bite changes, gum irritation, or loose teeth.

My snoring has not reduced yet

You most likely need more forward advancement. Turn each screw clockwise to the same mark, one small increment at a time, and give each setting a couple of nights before you move again. Results vary from person to person.

How do I clean it?

Clean it daily with a toothbrush and toothpaste using cool water. Denture cleaning tablets or a mouthpiece cleaning solution also work, following that cleaner's instructions. Do not use boiling water after fitting, and avoid bleach, harsh chemicals, and abrasive cleaners.

How long will it last?

With normal use, VitalSleep typically lasts about a year. Heavy teeth grinders may see a shorter lifespan. We include a one-year limited warranty for products that fail during normal use.

Can I use it with crowns, bridges, or implants?

VitalSleep needs enough stable natural teeth to hold it securely. Crowns, bridges, partials, and implants should be secure, and implants should be at least one year old. Ask your dentist about your specific situation before fitting it. It is generally not recommended with full dentures.

Still stuck? Talk to a person

You already own a VitalSleep

Our U.S. support team knows the product and can walk you through the fit on the phone. Mon to Fri, 9 a.m. to 5 p.m. ET.

Call 1-866-753-3780

Or email support@vitalsleep.com. Download the instruction manual (PDF).

You are still deciding

VitalSleep is an FDA-cleared adjustable mouthpiece that gently moves the lower jaw forward to open the airway. Over 600,000 adults since 2011.

Try It for 60 Nights

Free U.S. shipping. Made in the USA. Free replacements for one year.

How VitalSleep works Video tutorials Find your size All FAQs Compare mouthpieces

Snoring has a cause. VitalSleep works on it.

The VitalSleep adjustable anti-snoring mouthpiece gently moves the lower jaw forward to open the airway. FDA-cleared. Made in the USA. Over 600,000 adults since 2011.

Transform Your Sleep

60 nights to decide. Free replacements for 1 year.