Grays Viper Pro 3 Hockey Mouthguards* 3 Layers of protection combine to provide layering protection system combining harder and softer components to provide optimum protection combined with a comfort fit. * Easy Breathe A built in integrated breathing channel. Pre Contoured Shape with extra wall thickness, the mouthguard acts to minimise trauma to the jaw and skull and reduce the chances of injury. * Optimum fit and comfortable high performance polymer EVA ensure easy breathing and