JM Athletix Bikini Brief 90% cotton Machine wash cold, do not bleach. Tumble dry low, warm iron if needed. Wash dark colors separately. 90% Cotton / 10% Lycra Machine wash cold, do not bleach. Tumble dry low, warm iron if needed. Wash dark colors separately. Small Waist: 28-30", Medium Waist: 32-34", Large Waist: 36-38", Extra Large Waist: 40-42"