Durable rip-stop nylon is designed to take a beating and come back for more. Complete set comes with long sleeve top and pants. Rugged elastic around neck, arm cuffs, waist, waistline and ankles help trap in air for an incredible "sauna" action. Designed to fit big for better results. Really increases sweat and perspiration.Sizes: Regular (S/M), X-Large (L/XL), Heavyweight (3XL pants, 4XL top).