Ergowear Men's X3D Bikini Underwear EW0100, Black Machine wash cold. Do not use bleach. Lay flat to dry or hang dry. Iron on low heat as needed. 80% Polyamide / 20% Spandex Machine wash cold. Do not use bleach. Lay flat to dry or hang dry. Iron on low heat as needed. Small Waist: 27-29", Medium Waist: 30-32", Large Waist: 33-35", Extra Large Waist: 36-38"