The Hot Chillys Men's Elite Heat Mid Volume Ski Socks are made for skiers seeking impressive strength, durability, and heat. Thanks to their innovative construction and impressive nylon blend, these ski socks are able to keep you comfortable throughout the day. These socks boast lightweight hollow fibers embedded with permanent oxide minerals that can harness the body's far infrared energy to generate gentle warmth. They have active Carbon embedded into fibers, which provides enhanced thermal regulation and odor-blocking properties. The Hot Chillys Men's Elite Heat Mid Volume Ski Socks are low volume for less bulk in your boots.