Made in USA or Imported 3 high 5 wide WARM INSULATION: Experience durability at its peak with the Smartwool PhD Outdoor Heavy Crew Socks. These socks are built for performance in the highest degree, making them ready for any adventure on your list while keeping your feet toasty warm and dry even in the harshest conditions. COMFORTABLE FIT: The Virtually Seamless toe and 4 Degree fit system on the PhD Outdoor Heavy Crew Socks provides a performance-oriented fit with an ankle flex zone for enhanced comfort all day long. DURABLE YET BREATHABLE: Whether you??e mountaineering, running, multi-day backpacking, hiking, or just shoveling snow in the dead of winter, the Indestructawool technology and body-mapped mesh zones featured on the PhD Outdoor Heavy Crew Socks provides exceptional durability and breathability all season long. HEAVY CUSHION: The heavily cushioned bottom on the PhD Outdoor Heavy Crew Socks will provide you with impact absorption and warmth. Specially designed for extended excursions, these socks will help push through even the most intense workouts. CARE INSTRUCTIONS: Comprised of 68% Merino Wool, 30% Nylon, and 2% Elastane, the PhD Outdoor Heavy Crew Socks should be machine washed inside out in warm water and tumble dried on low. These socks should not be bleached, ironed, or dry cleaned.