Women's 4F thermal leggings are a seamless design that works perfectly as an undergarment under a ski suit. The leggings are ankle-length. Made of stretchy, form-fitting fabric with 4FSkin technology. Perfect as a first layer. Flat seams and elastic threads prevent chafing and irritation. 4FDry technology supports moisture management. Material: 54% polyamide, 40% polyester, 6% elastane