... -031 Description:Neoprene Hinge Knee Support Material: Neoprene, Nylon, Hinge Size: S,M,L,XL Item: KN-031Description:Neoprene Hinge Knee SupportMaterial: Neoprene, Nylon, HingeSize ... : S,M,L,XLFeature & Function:Neoprene knee support with metallic hinges with polycentric ...