Fit System: Super Tight Compression Gel-Fit * Gel-Fit Liner custom mold to teeth for a tight, comfortable fit * Shock Transfer Core - new lightweight profile fits closer and 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, which may increase strength and athletic performance * Ultimate protection in a compact size for easier breathing and speaking