ULTRA LITE thermal socks have been designed to provide Heat Holders' famous thermal protection and comfort in a lightweight profile, ideal for wearing in closer fitting footwear! Snow Sports socks include a reinforced heel for heavier activity. Fit & Design: Men's Long Socks measure approximately 14.2" from heel to top, compared with 9.4" for Men's Crews Extra-long length - ideal for snow sports Reinforced heel for heavier activity Advanced thermal yarn More than 3X warmer than a basic cotton sock Sensationally soft Non-binding, and diabetic friendly Single pair pack