95% Polyester + 5% Spandex Quick dry stretch fabric : keep you dry and flexible workout, lightweight and efficient breathable, 4-way stretch fabric panel. These swim trunks ensure snug fitting while helping improve mobility. Polyester,Spandex,Mesh Fastening: Elastic Modern/Fitted Stretch Mesh lining and Zipper pockets : lining soft & comfortable; Two side zipper pockets for safer storage. Suitable for any circumstance : swimming, beach surfing, running, ball sports, at home and etc. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.