This brace features an exclusive Ankle Lok offset panel traps laces between inner and outer flap to hold tighter, longer than any other brace. As well as exclusive close spaced eyelets concentrate holding power where it's needed, creating the most effective heel lock. The full elastic back ensures unrestricted blood flow to Achilles tendon, virtually eliminates chance of blistering. The internal U-shaped spiral stays provide extra support, further minimize risk of ankle injury. The short curved heat-sealed arch fits contour of foot as well as the seamless design. The triple layer vinyl laminate combines durability and comfort. Exclusive padded tongue option makes it easier to slip brace on/off, which increases the comfort when used on fresh sprains. Optional stabilizer inserts slip inside pockets of Ankle Lok for extra support.