The SleepTight mouthpiece, or STM, is a Mandibular Advancement Device (MAD) that is worn overnight to help correct the problems that cause snoring.

It was designed and created by a dentist with more than 30 years of experience and has an FDA clearance for sale in the US as an anti-snoring aid.

I had heard good things about this device, so I decided to try it and see if it would be a stand-out performer in the world of MADs.

Company Information

Dr. Mike Williams

Dr. Mike Williams

Dr. Mike Williams is the designer and developer.

He is a dentist with over 30 years’ experience, and he created this device together with a mouthguard researcher and developer from the UK named Paul Swann.

The company sought and received FDA clearance, showing that the product is safe and effective.

A Closer Look

How SleepTight Works

There has been plenty of research that shows the effectiveness of MAD (or Mandibular Advancement Device) mouthpieces, and the American Academy of Dental Sleep Medicine recommends them for treating snoring.

So, what does the SleepTight do to correct snoring?

This mouthpiece is worn like a mouthguard while sleeping.  It brings your lower jaw forward slightly, and I found that the STM actually held my tongue forward slightly as well.

In this position, all the loose muscles and tissues in your mouth and airways are held open, which stops the vibration that creates the snoring sound.

There are over 20 different types of MADs to choose from, but the SleepTight is definitely a quality product that is worth investigating.

Noteworthy Features

The STM was released in 2014 and is a “boil and bite” style MAD, made from an EVA thermoplastic resin – which means it becomes soft and moldable when heated.

The SleepTIght is different from other similar MADs because it doesn’t have just a single layer of temperature-sensitive plastic but works with a three-layer system.  The center of the device holds a plastic that is firmer than the outside coating.

When you heat the device, the outside layer easily molds to your teeth, and the inside layer stays firm but pliable.  This design allows for a firmer fit.

I have tried some mouthpieces where the plastic is too soft and doesn’t stay put, and others where the plastic is much too firm and is uncomfortable and easy to fall out during sleep.  The STM has the best of both worlds.

The STM also features a particularly large hole in the front to breathe through.  I am a mouth breather and often get a stuffy nose from allergies, so the extra-large hole for breathing through my mouth at night is very important.

Because of this extra-large hole in the front, the mouthpiece manages to avoid any blockages to your normal breathing and doesn’t cause any whistling sounds like similar devices with smaller holes to breathe through.

Another feature that is simple but different is the ridges that are placed where your teeth sit on the mouthguard trays.  When you mold the device to your teeth, the ridges allow you to get an even closer fit that stops it falling out during sleep or shifting position.

Pros and Cons


  • Unique boil and bite design
  • Made by an experienced dentist
  • Large breathing hole in front
  • Does help keep your tongue forward
  • Solid design
  • Easy to clean
  • No BPA or latex
  • Easy to custom fit
  • FDA clearance
  • A comfortable MAD
  • Works well
  • Made in the UK and shipped to the US
  • 30-day trial
  • Can help with OSA (on medical advice)


  • Can be uncomfortable initially
  • Quite pricey
  • Can cause excess saliva
  • One size fits all (except for boil and bite customization)
  • Not suitable for people who wear dentures or have jaw issues

Price and Warranty 

When you order this anti-snoring product, you will only pay $9.95.

You get 30 days from the date of your order to receive and trial the STM.  If you don’t like it, you can return it for no further charges (although your $9.95 is non-refundable).

If you like the device, you simply hold onto it, and your method of payment will be charged the remaining price of $77.95 after the 30 days.

Fitting the Device

I ordered and received my STM, and the first step was to make sure it was fitted to my mouth.

To fit your own device, you will need a few things:

  • A container for boiling water
  • A container for cold water
  • Something to get the MAD out of the hot water – tongs or a spoon
  • A timer
  • Your mouthpiece

How to boil-and-bite your STM device:

  1. Boil a few cups of water and pour them into your first container.
  2. Let that water cool for around 2 minutes, so it is very hot but not boiling.
  3. Put your mouthpiece into the water for 3 minutes. Make sure it is completely covered but be gentle, so you keep the shape.
  4. Get the mouthpiece out of the water and check it is basically in shape.
  5. Put it into your mouth using a mirror, so you get the placement right.
  6. Bite down firmly – remember your jaw should be very slightly forward.
  7. Mold the plastic around your teeth with your fingers and tongue.
  8. After a minute, remove it from your mouth and put it in cold water.
  9. Once the shape has set, check it to see if it is right. If so, you can remove the spacer.

You can repeat this process up to 5 times if necessary, but each time can make your device slightly weaker.  I would definitely recommend taking extra care to get it right the first time.

Cleaning Your STM Device

When you’re ready to clean your device, use a very soft toothbrush with liquid soap.  I also soak it in denture cleaner for extra hygiene.

Toothpaste won’t work, because it can be abrasive.  If you look after your device, it should last between 6 months and 24 months.

How you use it and factors like whether you grind your teeth at night will shorten its lifespan.

My Experience

I found this device really easy to order, and the 30-day trial was simple as well.  The product came quickly and was so easy to set up.  It only took once for me to make a good impression of my teeth, and I could instantly feel how it gently kept my jaw forward.

I noticed that I was also holding my tongue forward as well.

The first night, I did notice some excess saliva which is pretty common with these types of devices.  I was particularly impressed with how firm the mouthpiece was without being uncomfortable – those layers of plastic and the ridges made it a great fit.

I knew after the first night that the device had corrected my snoring, because I woke up feeling refreshed.  My wife and the snoring app confirmed it – my snoring had reduced significantly.   I continued using it through some allergy flare-ups and found the mouth-breathing option was fantastic.

Who is the STM Recommended For?

The SleepTight mouthpiece is recommended for problem snorers and is suitable for almost everyone.  It doesn’t contain BPAs, which are commonly found in plastics and have been linked to health issues.  It also doesn’t contain latex, which makes it suitable for people with a latex allergy.

People with partial dentures should still be able to use this mouthpiece.  A number of conditions make it important that the wearer can breathe through their mouth – allergies, colds, nasal inflammation and irritation, sinus issues or other airway issues.  The mouthpiece should be suitable for these conditions.

It is also one of the very few mouthpieces that can be of some help to people who suffer from obstructive sleep apnea.  It can only be used in mild to moderate cases.  Sleep apnea is a very serious condition, so you should never try to treat it yourself – only use this device on the advice of your doctor.

Some conditions will make this device unsuitable.  If you have asthma, central sleep apnea, severe obstructive sleep apnea or any respiratory issues, you shouldn’t try to use this device.  Full dentures aren’t suitable either – you might want to try a TRD instead.

Any loose teeth, or jaw, gum or dental problems means you should get medical advice before using.

Reviews from Actual Customers

Mixed reviews regarding the My Snoring Solution anti-snoring device“The SleepTight device was extremely easy to fit based on the instructions and video.  And the best news is that it is as comfortable and performs as well as my custom-fit device that I have been using for the last three years”. Mike O.

“I have been using one for the last few days and are surprised with how much better we’ve been sleeping” – Tami.

“the snoring is much improved. …I would say it works to relieve the snoring pretty well.” – Sharon.

Conclusion: Is It Right For You?

There is no doubt that the SleepTight is a great device and it does work.  There are only two slight problems I have with it – firstly, that it is quite expensive; and secondly, it doesn’t allow for much adjustment.

“Boil and bite” helps the device comfortably fit to your mouth, but additional adjustment options are needed to help get rid of jaw pain if you accidentally set your jaw too far forward.

There is another product on the market called the VitalSleep, which scores over the STM in my personal opinion.

The VitalSleep is significantly cheaper, and it uses micro-adjustments which helped immensely when it came to side effects for me.

It also has a 1-year replacement guarantee and is a safer product overall.

Visit official VitalSleep website: 

Without the VitalSleep I would easily recommend the SleepTight mouthpiece but seeing as there is a slightly better product for a lower price, I would choose the VitalSleep.

The STM is a great product, and it does work, but it just falls short of being the top pick of its type.

My Rating: 4.1

Click Here to Access the Official SleepTight Mouthpiece Website

Which Product Should I Buy?

questionEvery person has a unique mouth and different needs for their particular snoring, so one that is perfect for one person, may not be the best option for another.

With well over 100 products on the market it can obviously be quite daunting to decide, “Which one?”

To help ease the decision process I have created a comparison chart where you can effortlessly assess each product and its features, price, pros and cons. I have also written several detailed reviews for those devices that I believe to be leading products.

If you would rather not spend a lot of time reading reviews, please take a look at the article linked here: My Mouthpiece Recommendation. It’s a list of three products which I believe, based on my extensive experience, are the best options available to people who suffer from snoring.