Darn Tough Hiker Micro Crew Cushion Socks - Men's Large Euc Darn Tough uses a custom-count, shrink-treated merino wool that enhances comfort and durability for outdoor activities Merino wool wicks away moisture and breathes to regulate temperature for outstanding comfort in a variety of conditions Mid-level cushion density under foot Provides reinforcement at the heels and toes and elastic support around the arch Ring-toe construction hides seams and enhances comfort Noncushioned, wide-ribbed, crew-height legs Darn Tough recommends that you machine wash socks inside out in warm water on gentle cycle and tumble dry on low