Peresvit Mouth Guard Gel Filled with Case Premium Mouthguard for Football Boxing BJJ MMA Contact Challenge Game Peresvit Protector Mouthguard with gel fit liner is perfect combination of protection, comfort and price. It can be used in all kind of contact sports and any adult who is more then 11. Features: side caution pads stabilize upper and lower jaw in correct position; low profile allows you to breathe and speak easily; additional internal layer absorb impact; antibacterial case included.