The Hot Pepper socks are rated with a warmth factor of 7 on a scale to 10 so you know they are warm. The fabric is made of MTF(Moisture Transfer Fibers) yarns to keep your foot dry and comfortable. They are constructed with cushioned areas to protect you from the harshness of stiff ski and snowboard boots.
Fabric: 45% Polyester / 35% Nylon / 12% Acrylic / 5% Rubber / 3% Elastic