Sellstrom S96110 Knee Pro Ultra Flex III Series - Durable, Hard Plastic, Hinged Knee Pad The ultimate comfort and durability in patella protection Extremely durable hard plastic outer shell with 1/2" closed cell foam pad inside for ultimate comfort Orange non-marking grip-strip provides the user the security and grip it needs in a knee pad without leaving marks or residue on your work area Hinged with metal rivet for ease of movement while kneeling or walking Soft elastic woven straps with reinforced sewn ends are attached well above and below the knee