Meets National and State High School rules. Suitable for all contact sports Made with a Dual layer construction dissipates shock waves and reduces overall force, offering outstanding protection. Patented single compression cage, harnesses the power of the jaw during fitting to create a perfect impression Patented fin technology which molds to the contours of your teeth and gums during the fitting process, for a secure and unique fit Cushioned air flow for enhanced breathability The Adult Size (10+) comes in Red, Black, and Blue Brought to you by the world's most innovative mouthguard brand. The OPRO Self-Fit Gold mouthguard combines a dual layer outer construction with a unique ultra hi-flow gel inner channel to provide an outstanding level of protection and a secure, retentive fit that rests easily over teeth. Includes a patented single compression cage; this revolutionary fitting technology harnesses the immense power of the jaw to compress the mouthguard over the teeth and gums for the perfect impression and truly unique fit.