Ultra STC FIT SYSTEM: Super Tight Compression Gel-Fit (1) GEL-FIT LINER custom molds to teeth for a tight, comfortable fit (2) 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 (3) AIR CUSHION SHOCK PADS new spring-effect jaw pads for a more comfortable jaw compression rate and improved fit (4) 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 (5) CONVERTIBLE TETHER quick-release tether allows the mouthguard to be used strapped or strapless Ultimate protection in an improved better fitting compact size for easier breathing and speaking. Sizes: Youth: age 11 and under; Adult: age 11 and over Colors: Black, Red LATEX FREE NOT FOR USE WITH BRACES IMPORTANT FITTING INSTRUCTIONS INSIDE