The Resort Ski Sock is built to disappear inside a ski boot for a full day on the mountain, with an elastic band at the top that helps prevent the chafing boots are known for. An extended heel and targeted cushioning at the ankle, Achilles, and top of the foot protect the spots that take the most pressure lap after lap, while a blend of recycled polyester, polyamide, and merino wool balances warmth with durability. What Our Gearhead(R) Experts Are Saying:"I skied a full resort day in these and pulled my boots off at the end with zero hot spots on my heel or ankle."