Details Reviews (0) DARN TOUGH Thermolite® RFL Over-The-Calf Ultra-Light SKI SOCK Ski and ride with all the feels. Slip into the synthetic version of our lightest women’s snowboard and ski sock for a seamless and dreamy connection to your boots and all the adventures you’re riding on. RFL Thermolite Over The Calf Ultra-light Womens Ski Sock 2019/2020