Material: Neoprene 2MM-4.5MM, (OPTIONAL) Colour : optional Size:SS#,S#,M#,L#,XL#(optional) Parking: each a polybag.(optional) Waterproof, soft and convenient; Protecting your knee when you are doing exercises;Material: neoprene 2mm--4.5mm;Size: SS#,S#,M#,L#,XL#, optional;Colour: optional;Logo: welcome OEM;Package: each in a polybag,Test: SGS test for material, CE & ATSM test for products.