Constructed of open cell foam and detachable medial/lateral aluminum I-beam stay panels for easy adjustment and custom fit. Three double bend posterior aluminum stays. Alternating web straps provide dual adjustability, using a D-ring buckle and a hook tab. After fitting, knee immobilizer can easily be removed by simply releasing hook tab. Fits 29" maximum thigh circumference. Ideal for post-operative immobilization, grade 1 and grade 2 collateral ligament sprain, and patella subluxations.