Calvin Klein Men's Prostretch Reflex Boxer Brief 90% Nylon, 10% Spandex Imported Elastic closure Machine wash warm, do not bleach. Tumble dry low, do not iron. Do not dry clean. Wash dark colors separately. 90% Nylon, 10% Spandex Pouch front Tagless coolmax gunmetal color waistband with red logo on front and back Machine wash Imported