68% polyester 26% cotton 4% viscose 2% elastane.The performance polyester and cotton composition of these boot socks efficiently absorbs, then wicks away moisture. This means that you will have less chance getting sweaty feet and blisters. They are a calf height design and have a comfortable feel to them. They have a terry cushioned heel and toe to give your feet a buffer from harsh terrain. They also include an arch support feature to guard against fatigued feet and to keep you going throughout the day.