Duofold Thermals - Mid-Weight Women's Ankle Length Thermal-Layer Pants cotton,polyester base-layer-underwear closure Fit for a woman - Two-layer thermal for warmth in cold weather Pointelle fabrication for added feminine detail Flatlock seams to avoid irritation. Comfort waistband for next-to-skin softness. Fiber Content: 60% Cotton / 40% polyester bi-ply jersey