2 In 1 Compression Liner: each swim trunk has a sewn in boxer brief compression liner that is not removable, delivering secure support with zero ride up Drawstring Elastic Waist: an adjustable drawstring and stretch elastic waistband keep each bathing suit secure in the water and on the walk back Quick Dry Stretch Fabric: a 6% Spandex blend wicks water and dries fast between swims, so these stay light rather than heavy and soaked Secure Pockets: pockets hold a phone, keys or a card at the beach, on the boat and around the pool Big And Tall Size Run: the run extends through big and tall sizing, three pairs per pack, machine wash cold and hang dry