Description 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 our signature Virtually Seamless™ toe for extraordinary comfort in any trail shoe. Features Indestructawool™ technology for enhanced durability 4 Degree™ elite fit system for a dialed, performance-oriented fit Body-mapped mesh zones for added breathability Virtually Seamless™ toe for enhanced comfort 8.5" overall height 68% Merino Wool, 30% Nylon, 2% Elastane Style: SW001073 Benefits 4 Degree™ Elite Fit System 4 Degree™ Elite Fit System For a dialed, performance-oriented fit with flex zone at ankle joint Heavy Cushion Heavy Cushion Heavy impact absorption and warmth for extended excursions Indestructawool™ Indestructawool™ Indestructawool™ Technology Features A Patent-Pending Construction Method For Exceptional Durability And Comfort PhD® PhD® Built for Performance in the Highest Degree Care Machine wash warm, wash inside out. Do not bleach. Tumble dry low. Do not iron. Do not dry clean.