Functional Activator
A tongue posture mouth guard you sleep in.
Size Small selected
As seen in
- Forbes
- Men's Health
- healthline
- HUFFPOST
- INSIDER
“Breathing has never felt this satisfying.”
BETTER BREATHING STARTS WITH YOUR TONGUE
Breathing plays a fundamental role in endurance, recovery, and physical performance. Discover how the Functional Activator encourage natural tongue positioning helping you develop better breathing habits that extend beyond wearing the device.
How it works
How the Functional Activator works
The Functional Activator is a tongue posture trainer you wear at night. It guides your tongue up to rest against the roof of your mouth, and its closed shape keeps you breathing through your nose instead of your mouth while you sleep. There is nothing to practice and nothing to wear during your day, because the training happens over the hours you're asleep.
1 of 5
A sealed, double-arch tongue posture device
Made from flexible, BPA-free silicone.
The comparison
Many conventional mouthguards use heated, molded fitting materials and are designed primarily around the teeth. The Functional Activator uses flexible, BPA-free silicone and is designed around tongue posture and active jaw function.
The Functional Activator
Choose the size that fits your mouth.
One measurement decides it. Take the reading, find the row it falls in, and that row is your size. If the reading sits on a boundary, the full guide shows how to resolve it.
| Small | 33 millimetres or less | Younger users or smaller mouth size. |
| Medium | 34 to 37 millimetres | Most adults. Fits the majority. |
| Large | 38 millimetres or more | Larger mouth size or broader jaw. |
Small
33 millimetres or less
Medium
34 to 37 millimetres
Large
38 millimetres or more
Small, Medium and Large, with the mouth size each one suits.
Buying the Functional Activator for your child?
Get a little more guidance before you begin.
If you're unsure whether your child's jaw is developing evenly, you can submit five simple photos for review and receive guidance on whether additional functional support may be appropriate.
I just want the
Functional Activator
Continue with the Functional Activator and standard usage instructions.
CONTINUE SHOPPINGGET GUIDANCE FOR YOUR CHILD
I'd like guidance
for my child
Take five guided photos of your child's face and bite to begin a functional review.
Takes about 5 minutes. No diagnosis from photos.
Your images are reviewed as part of the assessment process.
Frequently asked questions
Can I sleep with the Functional Activator?
Yes, and sleeping in it is the goal. Your tongue spends the whole night in whatever position it falls into, so the hours you're asleep are where the Functional Activator does most of its work. Wear it for short periods during the day until it feels familiar, then move it to bedtime and keep it in through the night.
Where should your tongue rest when you sleep?
Your tongue rests gently against the roof of your mouth, with your lips closed and your breathing going through your nose. Holding that position is possible while you're awake and paying attention, but as everything relaxes during sleep, the tongue can drop and the lips can part. The Functional Activator is shaped to guide the tongue up and keep the mouth sealed through the night.
Is this more efficient than mewing?
Mewing means keeping your tongue on the roof of your mouth, which takes constant attention during the day and isn't possible to do on purpose while you sleep. The Functional Activator's double-arch shape guides your tongue into that position, and because it is sealed with no breathing holes, your breathing moves through your nose while you wear it. Since the device holds the position for you, the training continues during the hours you can't think about it.
How is a tongue posture device different from a regular mouth guard?
A regular mouth guard is built to protect your teeth, while a tongue posture device is shaped to place your tongue. The Functional Activator is made from flexible, BPA-free silicone with a double-arch design that guides the tongue up to the roof of the mouth, and its closed shape keeps your breathing through your nose. It adapts to the width of your mouth as soon as you release it, with no boiling or molding.
Can I use it instead of mouth tape?
Tape closes your lips from the outside and leaves your tongue wherever it happens to fall. The Functional Activator works from the inside: it guides your tongue to the roof of your mouth and, with no breathing holes, keeps your breathing through your nose, with nothing stuck to your skin.
How do I know which size to choose?
Measure from canine to canine using dental floss, then lay the floss against a ruler. A measurement of 33 mm or less is Small, 34 to 37 mm is Medium, and 38 mm or more is Large. If your measurement sits on a boundary, the full size guide on this page shows how to decide.
Functional Activator
- Body-wide Effect: Ensures proper position of the head and neck
- Tension Reducing Activator: Prevents clenching and reduces stress to avoid jaw pain
- Sports Performance Mouthguard: Increases VO2Max, strength, and balance
- Easy to use: Does not require boiling or molding
- Allergen-Free: 100% biocompatible to avoid allergies.Without bisphenol, phthalate (endocrine disrupters), and PVC
Customer Reviews
- Reviews
- Questions
- activator
- Functional Activator
- breathing
- posture
- pain
- mouth
- device
- teeth
- difference
- life
I have learned to live with neck pain my whole life. This device changed that! I recommend ++
Smooth on the teeth. I am stronger with this when I train. Really nice.
No more clenching!!! Amazing.
CanadaImpressive
I’ve tried many mouthguards in the past and this one has really really made a great difference for me.