Calvin Klein Small Black Steel Trunk Low rise with a double-ply pouch. Fabric is 84% polyester, 16% elastane. Waistband is 65% nylon, 26% polyester, 9% elastane Care Instructions: Machine wash cold, gentle, non-chlorine bleach when needed. Tumble dry low. Do not iron. I have new unworn ones and also the ones pictured which I have worn a couple of times only.