Upper and lower bite channels promote talking and breathing through mouth while clenching, enhancing strength and endurance. Unlike other mouthguards, the Brain Pad locks jaw in a comfortable down and forward position that creates padding between the bones of the jaw joint & the base of the skull, which helps prevent the lower jaw from slamming into the base of the skull and brain with every strike. Reduces jaw impact and concussions. Patented low channel stabilizer. Increased airway space. $12,000 dental warranty. Youth size is for ages 10 and under. Easily fits over braces. Double mouth guard. Strap or strapless design. Once opened, mouth guards cannot be returned.