Hanes Big Men"s X-Temp Thermal Underwear Pant: * 60% cotton, 40% polyester * Elastic waistband on pants * Flat No Rub Seams * Soft Waffle Thermal Fabric * Shrinkage Controlled * Comfortable Rib Knit Cuffs * Sturdy Seam Construction * Snug fitting - buy a size large for a looser fit * Machine wash cold