1. knee protector 2. material:cotton,neoprene,acrylic, nylon,polyester etc 3.thickness:2-5mm 1. name:knee protector2. material cotton,polyester, neoprene, acrylic ... ,garment,bags etc industry. sport products have wristbands,sport headband,knee brace,waist brace,sport ankle etc.In addition,also produce ...