Molehill Boys Polar Fleece Pants (Infant to Big Kids) Main Fabric - 100% Polyester. Contrast Fabric - 100% Teflon Coated Nylon. Imported Elastic closure Boys warm, comfortable and snuggly fleece pants Reinforced knees for durability and warmth using waterproof, breathable nylon Elastic waist and ankle cuffs Flat lock stitching throughout for added strength and durability Molehill logo on left leg