Sisu Mouthguards

SISU Aero Guard 1.6 Medium Mouth Guard

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The SISU Aero Guard 1.6 Medium Mouth Guard, for ages 11+

Roller Derby, Soccer, Hockey, Lacrosse, Baseball, Football

Sisu NEW Sizing Guide 
Small Formally JR Size: Recommended for ages 7+ or smaller mouths 
Medium Formally Adult: Recommended for ages 11+ and average mouths 
Large NEW SIZE: Recommended for ages 13+ and larger mouths  

1.6 mm thin  50% thinner  30% stronger

At a lean 1.6mm, the ultralight design of the SISU Aero Guard is 50% thinner than conventional sports mouth guards, providing maximum comfort and convenience. Combined with its quick, custom and remoldable fit, you´ll entirely forget it’s there.

Four reasons to choose the SISU Aero Guard 1.6 Mouth Guard
•Less transfer of impact forces to teeth
•More absorption of impact forces by the material
•Less deformation of the material
•Higher tensile strength (tougher material)

A recent independent study from Adrian College, Michigan shows that SISU™ (previously Protech Dent™) rates higher than its competitors with regards to athletes ability to breathe, talk, drink. SISU users also reported less gagging and better fit, even though more than half of the athletes had expensive dentist made mouth guards.

A recent study shows SISU mouth guards prevent germ transfer

In addition, the following SISU advantages were noted:
•Non-compressible – minimal deform
•Distributes forces over larger area
•30% better protection
•Ultra thin (1.6mm) – comfortable
•Players can easily drink and talk
•Custom fit in minutes
•Superior hygiene – players keep guards in, resulting in no bacterial transfer from hands to guard



SISU NextGen is the latest evolution in mouthguard engineering by the makers of SISU Guard. Simply put, it is the most powerful mouthguard we’ve ever built. With its unmatched quality and functionality, SISU NextGen was designed with the athlete in mind, and its unique new features are hyper focused on additional protection and comfort.

More Protection

The Aero is made from a high-tech thermoplastic material that is 30% stronger and has 8x greater tensile strength than conventional mouthguard materials. This means that no matter how intense things get during game time, your SISU Aero has your back and your teeth.


The most unique feature of the SISU Aero is its super-slim, ultralight design. At a lean 1.6 mm, the Aero is 50% thinner than your standard mouthguard. Combined with its quick, custom and remoldable fit, you´ll entirely forget there's something awesome and plastic inside your mouth.

The Science of SISU

In the SISU labs, we have put each mouthguard through strenuous testing to see how it performs in relation to its competitors. SISU Guards are made from unique medical grade thermo-polymer, which is, remarkably enough, free of harmful chemicals. SISU material is non-compressible, which enables SISU Guards to outperform the competition in tensile strength tests.

The tensile strength of SISU material is consistently at least 30% higher than that of conventional EVA (a material most other mouthguards are made of). In reality, our material performs even better, due to the built-in Diffusix™ Technology, better protecting your teeth from damage. Learn more about the Science of SISU at


Powered by our patented Diffusix™ Technology and engineered to withstand even more impact, SISU NextGen delivers even more protection with its scientifically re-designed perforation pattern. Based on suspension bridge technology, the main function of the perforations is to redirect the forces of impact. On impact, perforations oscillate and send the forces into our scientifically engineered Crumple Zones - the reinforced points of the guard that don’t cave in under pressure. Here, the force of impact is redirected away from teeth and absorbed into the non-compressible surface of the guard. This unique design empowers SISU NextGen to protect you from even the toughest hits.


Custom fit, remoldable SISU NextGen features a wider bite pad, rounded edges and improved moldability. Rounded, bevelled edges soften the point of contact between the guard and the mouth, and improvements in the perforation alignment enable maximum dissipation of force transmitted from the point of impact. Superior protection is not the only function of the perforations. They also allow for flexibility to create an intimate custom fit, so unique to the player’s mouth that the guard remains in the mouth during the entire game or practice. Additionally, perforations allow for natural flow of air and saliva to empower athletes to talk normally, breathe naturally and stay hydrated during the game.

Please check videos that will help with molding in the video section

Sisu mouthguards come with a warranty - register your mouth guard

5 Reviews Hide Reviews Show Reviews

  • 5
    So Comfy

    Posted by Theresa on 18th Oct 2020

    I really love this mouthguard! I barely even notice it's there it's so comfy! I can drink water and talk just fine.

  • 4
    Fits well

    Posted by Chantelle Kennedy on 29th Jan 2020

    Took 2 tries to get it right. It fits well after I got it. Can talk and drink with it in no problem.

  • 5
    Sisu is best

    Posted by Cherry Von Villain on 12th Sep 2018

    The Sisu mouth guard is the best mouth guard for sports like roller derby. No other mouth guard fits as perfectly as one you can customize yourself! Love this brand!

  • 5
    Feel great in my mouth

    Posted by Unknown on 28th May 2017

    Unlike other mouth guards this one fits secure in my mouth. I had to shape it twice in the first fitting but I finally got it in second by watching the videos and rereading the instructions. I can actually speak with it in my mouth and drink.

  • 3
    Mouth guard

    Posted by Unknown on 15th Feb 2016

    They are easy to mould to the mouth but if you have braces I wouldn't suggest them