Sisu Mouthguard Review

Originating in the USA with founders from Sweden, SISU (a Finnish concept) is one of the most thoroughly researched and technologically advanced mouth guards on the market. With a concept of less mouth guard and more protection, SISU guards really are state of the art.


Due to it’s unconventional nature, it is best to explain the SISU mouthguard in more detail. The SISU comes as a flat arc which is then to be boiled and bitten into shape in a similar manner to regular mouth guards. The difference however is the fit at the end of the boil and biting stage. SISU mouth guards much more accurately define the shape of the individual’s mouth and feel more like a professional fit. There are two types of guard – the Aero and the Max guard. The Aero is designed for lighter activities where as the Max is designed for more intense sports like Jiu Jitsu or Boxing. According to SISU the mouth guard is over 50% stronger than your average mouth guard but due to the thermoplastic materials used to construct it, it is 305 thinner overall.

The SISU mouth guard requires moulding just like any other mouth guard you may have had before – by boiling and biting. The guard arrives in a flat, crescent shape which is molded to the shape of the individuals teeth. This makes it a lot tighter than other guards when it finally hardens into place. It requires a little effort in prying the guard out of your mouth, but it is this snug fit that is part of the guard’s protective qualities.

The Look

The SISU mouth guard doesn’t shrimp on the choice of colour. There are plenty of colours to choose from for those of you who are picky about that sort of thing. However, due to the nature of the molding process and the tight, snug fit, the guard doesn’t have any fancy designs or lettering on it. It definitely has the feel of something ‘scientific’ rather than fashion orientated and it’s primary focus is on protection – as it should be.


Of course, as previously mentioned, the mouth guard is extremely thin and you can tell this as soon as it arrives and you open the box. However, as well as being extremely thin, the mouth guard is also dotted with small perforations all over. These perforations are said to be for dispersing shock across the entirety of the guard rather than on the specific spot it is struck. The little perforations also enable air to flow through them which is great for any cardio intensive sport like jiu jitsu.


The SISU mouth guard is a one of a kind mouth guard and as such it isn’t going to feel the same as a regular guard. Due to it’s extreme thinness, the guard may feel strange inside your mouth initially. This is partially because we’re all used to bulky mouth guards and probably associate that bulkiness with protective qualities. So here, with the much thinner SISU mouth guard there can be a psychological ‘getting used to it stage’ where you may feel like your mouth is not protected in its usual way.

One of the benefits of this guard is that you don’t need to keep taking it out and putting it back in again during training sessions. It is so thin that you can forget it is there and it is also possible to talk with the guard in and take a quick drink without removing it. The tightness of the guard is also a great feature because there is no need to be constantly biting down on it throughout your training session to make sure it stays in like some guards. Instead it clips itself to your teeth and will remain there until you remove it.


The SISU Max guard is available for around $34.99 in the US. Now, of course this is a rather expensive mouth guard, especially when you can buy a regular guard for around £6. However, you would pay more for a custom, professional guard and this one is one of the highest quality ‘boil and bit’ guards on the market. If you’re looking for a mouth guard with minimal bulk and a feeling of not even wearing a mouth guard at all, then the price tag is worth it.

Overall, this mouth guard is an excellent addition to your training equipment and does a great job in protecting one of your most expensive assets – your teeth. The guard is very comfortable and provides excellent protection for a decent price.

 Sisu Mouthguard Review
1,071 Reviews
SISU Mouth Guards Aero NextGen 1.6mm Custom Fit Sports Mouthguard for Youth/Adults, Charcoal Black
  • SISU Aero NextGen mouth guards offer premium, warrantied dental protection for players age 11 and up, including adults
  • At only 1.6mm thick, the ultralight design of the Aero is 50% thinner than conventional sports mouth guards, providing maximum comfort and convenience
  • The slim, custom fit makes it easy to talk, breath and drink without removing the guard, which contributes to better hygiene
  • Diffusix technology scientifically distributes impact forces from football, hockey, lacrosse, basketball, boxing and other contact games
  • Compared to the original, NextGen SISU guards feature a wider bite pad, rounded edges for comfort and improved mold-ability to ensure a perfect fit

About the author


Richard Presley

A purple belt in Brazilian Jiu-Jitsu, Richard is the owner and primary writer of Attack The back. Check out my About Me Page to learn more!

Leave a Comment