- Sleek & strong frame made of advance composite material for a lightweight, low-profile design while maintaining maximum strength. The Human Motion hinge provides progressive motion control and mimics the anatomical motion of the knee. Flexible cuffs are designed to conform to various leg shapes and accommodate muscle movements for comfort and ease of motion. The Quick-Loc Clip System & low-profile straps anchor the brace to the leg quickly and easily. Each brace comes standard with a thick and thin condyle pad set, three pairs of tool-free extension stops and one set of tibial shims.