100% Nylon The strap is woven from high-quality polyester and latex, environmentally friendly and resilient are excellent; It is worn around your waist to increases your body temperature and burns extra calories; With 6 pieces of segmented hook and loop fasteners, you can adjust the tightness according to your needs; Wrapped wear and without size requirements, fit the body curve, suitable for all women's figures; The product has passed 10,000 elastic tests, and the elasticity is stable and not easy to deform, strong, and durable. One Size: 5"W, 118"L Plus Size: 5"W, 157"L