Clever UK Swim Briefs Polyester 85% Spandex 15% Machine wash in gentle cycle, using mild detergent. Do not use chlorine bleach. Do not iron. Dry flat. 85% Polyester / 15% Spandex Machine wash in gentle cycle, using mild detergent. Do not use chlorine bleach. Do not iron. Dry flat. Small Waist: 27-29", Medium Waist: 30-32", Large Waist: 33-35", Extra Large Waist: 36-38"