Calvin Klein Cotton Classics 4-Pack Basic Briefs 100% cotton Machine wash warm, do not bleach. Tumble dry low, warm iron if needed. Do not dry clean. Wash dark colors separately. 100% Cotton Machine wash warm, do not bleach. Tumble dry low, warm iron if needed. Do not dry clean. Wash dark colors separately. Small Waist: 28-30", Medium Waist: 32-34", Large Waist: 36-38", Extra Large Waist: 40-42"