100% Polyester Drawstring closure Machine Wash Material :100%Polyester . Made out of our 4-way stretch fabric, quick-drying, breathable, lightweight breathable.breathable in hot summer, lightweight and comfortable . Machine washable. Feature: Elastic waistband with drawstring goes through entire the swim shorts is convenient to wear. Two secret side pocket give you fully sense of security. effective storage wallet, key, cell phone or other small items. Design: Elastic closure. There are many styles for you to choose. The unique design is awesome and can be styled with a plain top so they really pop out. Suitable for any circumstance: teach kids to swim at home, running, ball sports, walk, family picnic, beach surfing and etc, you can wear these all year-round if live in a warm climate. This Men's surf swim short is the best choice for any season. Warm Tips: Please reference the size chart of the last picture carefully to choose your size(S/M/L/XL/XXL/3XL/4XL) Occasion: This mens short trunk is soft and breathable enough for both beachwear and more activities. Such as: swimming, beach vacation, running, ball sports, family picnic and etc, or just daily wear in summer.