B002-GEL - Mouth Guard - Gel Fit - A+ Protection. Heavy duty rubber Shock Frame plus Gel-Fit liner provides ultimate protection, fit and comfort. Features include:Breathing Channels - Allows for easy breathing while clenched.Heavy Duty Rubber - Provides maximum protection for teeth, jaw and brain.Gel-Fit Liner - Gel liner material takes an exact impression of the teeth, providing a tight and comfortable fit.Protrudent Area - This feature prevents movement while clenched.