2 in 1 Swim Trunk Design: Double layer design. The inner lining is made of 92% polyester and 8% spandex, offering good breathability and comfort during sports activities. The compression lining helps protect your skin and prevents the outer shorts from sticking when wet. Multi-pocket Design: The men's swim shorts feature two front side zip pockets and one hidden built-in pocket. The lined phone pocket fits securely to help prevent your phone from falling during running or cycling. The two front side pockets provide ample space for storing phones, cards, keys, and small items, keeping your hands free during activities. 92% Polyester, 8% Elastane. Machine Wash. Fastening: Drawstring. Sleeveless. Quick Dry and Stretch Fabric: This swimwear is made from 4-way stretch polyester fabric with water-repellent technology, offering fast-drying performance and lightweight comfort. The water-repellent feature allows quick drying after getting wet, making it suitable for various water sports or beach activities. Elastic Waistband with Drawstring: The swim trunks feature an elastic waistband with an adjustable drawstring, allowing you to customize the fit and ensure the shorts stay securely in place for a comfortable beach experience. Wear On Multiple Occasions: The slightly elastic material and side slits allow freedom of movement, ideal for outdoor and indoor activities such as beach outings, surfing, swimming, and gym workouts. The lined shorts also offer good sweat-absorbing performance, making them a great choice for sports and fitness. Size suggestion: If you usually wear M (UK), please choose M. For more information, refer to the size chart.