Calvin Klein Modern Cotton Stretch 3-Pack Trunks, in Black, Rusted Root burgundy, and Rock Ridge grey. These great-value trunks feature a pouch front and are made with organic cotton. 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. This range uses certified organic cotton. The boxer trunks are cut from a soft cotton with enough stretch to ensure a superior fit. Featuring the Calvin Klein signature elastic waistband for breathable comfort and a sporty look, perfect for everyday wear.