GEL-FITTM LINER custom molds to teeth for a tight, comfortable fit * SHOCK TRANSFER CORETM directs impact away from the vulnerable front teeth to stronger triple-rooted molars to stabilize and shield the teeth * MORATM PERFORMANCE ENHANCEMENT when fitted and worn correctly, positions the lower jaw down and forward and the tongue up onto the roof of the mouth, which may increase strength and athletic performance * Ultimate protection in a compact size for easier breathing and speaking.