Comfortable, form-fitting EVA around single-shot ArmourBite Power Wedges. Reduces the effects of cortisol'a performance-sapping hormone that's released when under stress. Patented T-Bar Grip Fit System for enhanced comfort and retention. Improves strength, endurance, and reaction time. Reduces athletic stress, fatigue, and distraction. Scientifically proven in independent, peer-reviewed studies. Worn on lower teeth. Low-profile design has minimal to no impact on normal speech. Includes fitting tool. For non-contact sports. Made in the USA.