Composition¡êotop grade composite spandex, Velcro, aluminum strips. Feature: convenient to wear, tightness adjustable, free to move while wearing. Function: designed for the treatment of knee ligament injuries and cartilage tears, patellar fracture fixation, used following knee surgery and during knee rehabilitation and can help to provide stability and support, can be used daily. Specification: XXXL/XXL/XL/L/M/S