Features: The spring is of strong elasticity, reduce the pressure on your knees after you squat. Copper plated screw, easy disassembly without tools, no more complicated steps to worry about. Universal binding style, can be used by different kinds of people, protect knee from weight damage. Industrial computer sewing locomotive sewing thread, stitching more firm and precise. Breathable non-slip fabric with ventilation holes, suitable for climbing stairs, mountaineering, sports and heavy work handling, etc. Specification: Condition: 100% Brand New Item Type: Knee Brace Material: Carbon steel spring, cloth, plasticSize: Approx. 64 x 55 x 29.5cm/25.2 x 21.7 x 11.6in Function: Suitable for climbing, mountaineering, sports and bodybuilding, heavy work handling, etc, protect the knee from gravity Package List: 2 x Knee Brace .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Note:Add 40kg strength to the knee, reduce the pressure of the body on the knee after squatting, and the special made spring has strong elasticity