The Impact shorts are made from a four-way stretch fabric. A silicone band on the inside of the waistband and leg hem helps it stay in place when you move. The padded seat is complemented by Di Guard abrasion resistant inserts for added protection. The shorts feature UV 50+ protection to protect against the sun's harmful rays. These shorts are suitable for the practice of many nautical activities requiring protection at the level of the buttocks, such as navigation and paddling or sliding sports such as canoeing and kayaking. seat: 90% Neoprene 10% Nylon sizes XS - S - M - L - XL - XXL