Venture further and stay warmer with the PhD Outdoor Heavy Crew. Heavy cushioning and the power of Merino help keep your feet warm, dry and comfortable whether you're out on a multi-day trek or trudging through the snow. Featuring Indestructawool technology for ultimate durability in high wear areas, the 4 Degree elite fit system for a dialed fit and Smartwool’s signature Virtually Seamless toe for extraordinary comfort in any trail shoe.

• 73% Merino Wool, 25% Nylon, 2% Elastane
• Virtually Seamless™ toe
• 8.5 in. overall height
• Sock Height: Crew
• 4 Degree Elite Fit System uses two elastics for greater stretch and recovery to keep the sock in place
• Indestructawool™ technology features a patent-pending construction method for exceptional durability and comfort
• Mesh ventilation zones provide optimum moisture management and maximum breathability
• Heavy cushioning offering significant impact absorption for extended backcountry excursions
• Made in the USA of Imported yarn