Thorlos unisex-adult Exco Max Warmth and Cushion Extreme Cold Over the Calf Wool Thermal Socks

Designed for maximum protection and comfort in extreme cold weather conditions. Preferred choice for mountaineers climbing Mt. Everest; American Alpine Institute's "Guides Choice" winner. Specifically engineered for boots providing the protection and comfort.

• Exclusive Thor-Lon and natural wool construction to deliver superior insulation, softness, durability moisture wicking for warmer, drier, better feeling feet
• Fibers are chosen for performance and durability resulting in a sock that wears for years
• Unique Thorlo padding designed for cold weather boots
• Padding is clinically shown to reduce blisters, moisture, pain, and pressure
• Cushioned instep and arch for a better fit, more support, and less pressure on your feet
• Ventilation panel for extra moisture control and breathability