Can I trim my mouthguard?

Do not trim your SISU Mouthguard. Instead, if you have a smaller mouth, size down to a SISU Aero Small mouthguard. With SISU, every part of the guard is important when it comes to getting the most protection out of your mouthguard: the perforations, the crumple zones, the boomerang shape. Not only will trimming the guard void any available dental warranty, but your teeth will be at a lot more risk for injury.

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