Made of neoprene and elastic with overlapping side pulls for increased intra-abdominal support. It concentrates heat on your lower back and will not dig or jab while you sit. For more support it comes with a neoprene insert for optional use. Color: Beige. Sizes: XS (22-24), S(26-28), M(30-32), L(34-36), XL(38-42).