2XIST Pro No Show Trunks Machine wash cold.Non-chlorine bleach as needed. Tumble dry low heat. 89% Nylon / 11% Spandex Machine wash cold.Non-chlorine bleach as needed. Tumble dry low heat. Small Waist: 28-30", Medium Waist: 31-33", Large Waist: 34-36", Extra Large Waist: 37-39"