Size Chart: M:17.5X20X6CM /6.89X7.87X2.36inches L:18X20X6CM /7.08X7.87X2.36inches XL:18X20X6.5CM /7.08X7.87X2.56inches Get ready to play with this swim-ready, classic swim board shorts Moisture Wicking & Quick Dry Boys Swim Trunks are made of Imported 100% Polyester . Waterproof, Durable, Lightweight, Skin-friendly and Breathable fabric, with better ability to discharge water/moisture, making the swim trunks quick dry, the loose version makes your child comfortable in daily life. 4-way comfort stretch fabric for enhanced mobility let boys move comfortably. Lightweight - 20% lighter weight fabrics provides greater comfort in and out of the water High-density fabric that protects your skin from outsize hazards and harmful UV rays A covered elastic waistband with drawstring keeps these shorts secure for day-long comfort. 【Washing Instructions】Easy Care - Our boy's board shorts is quick dry and machine washable. Wash it in water below 40℃. Do not use detergents such as bleach. Do not soak for a long time. ironing, not dry cleaning.