Calvin Klein Modern Cotton Stretch 3-Pack Trunks, in Black, Rusted Root burgundy, and Rock Ridge grey. This great-value 3-pack features a pouch front and an organic cotton composition. The striking Calvin Klein Modern Cotton logo waistband is in a contrasting white. Fabric Composition: 57% Organic Cotton / 38% Modal / 5% Elastane. MPN: nb3963a-pt1. Our Collection at Boxers and Briefs contains only the highest quality Calvin Klein Mens Underwear. One of our most popular ranges is the Calvin Klein Modern Cotton underwear range, and now using certified Organic Cotton. In this range we have this great 3-pack of Calvin Klein Boxer Trunks, in Black/Grey/Burgundy, with contrasting white waistbands, and which are available in all sizes from Small to 4XL. Calvin Klein Men's Underwear size guide: Small = 28-30 inch waist, Medium = 32-34, Large = 34-36, X-Large = 36-38, XX-Large = 38-40, 3XL = 40-42, 4XL = 42-44.