Nike Swim Men's Essential Lap 5 Volley Short has a durable water-repellent finish to speed up the drying process when you're ready to head out for lunch. A built-in mesh brief and mesh pockets add valuable extra support and storage space to the swimming trunks. The sleek men's swim trunks have a secure elastic waist with a drawcord, so you can count on them to stay in place through each lap. Main 100% Polyester. Lining 50% Polyester, 50% Recycled polyester.