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.