FIT SYSTEM: Super Tight Compression Gel-Fit - GEL-FIT LINER custom molds to teeth for a tight, comfortable fit - SHOCK TRANSFER CORE directs impact away from the vulnerable front teeth to stronger triple-rooted molars to stabilize and shield the teeth - MORA 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 - UPPER/LOWER DESIGN with air cushioned shock pads protects upper and lower teeth and stabilizes the jaw for side impacts LATEX FREE NOT FOR USE WITH BRACES IMPORTANT FITTING INSTRUCTIONS INSIDE