Showtime Men's Quick Dry Solid Nylon Swim Trunks with Pockets 80% Nylon 20% Spandex Pls select your US size. QUICK DRY FABRIC--Swimming fabric,specially made for swimming, surfing and other water sports. ADJUSTABLE WAISTBAND--High elastic waistband with Drawstring for a snug, easy to adjustable fit CONVENIENT FRONT ZIPPER POCKET--Our zippered front little pocket is for you to carry keys for locker or any other little stuff.