These 2 in 1 men swim trunks with compression liner made of polyester and spandex material with 4-way stretch fabric are built to prevent friction, painful skin irritations and help you improve your performance by reducing muscle fatigue and soreness,water repellent, quick-dry ...These 2 in 1 men swim trunks with compression liner made of polyester and spandex material with 4-way stretch fabric are built to prevent friction, painful skin irritations and help you improve your performance by reducing muscle fatigue and soreness,water repellent, quick-dry, breathable, and lightweight.Besides,the compression lined mens board shorts have 2 slanted pockets, 1 liner pocket, 1 back flap pocket with velcro closure which could help accelerate water flowing down and achieve the effect of quick drying,suitable for swimming, beach, summer party, cruise, any summer vocation and so on.