Women's Mountaineering Micro Crew Heavyweight Hiking SocksBeefy in personality, versatile in form, our cushy Mountaineering sock makes the most of big summit efforts and down day energy in a Heavyweight Micro Crew. Full wrap cushion around the footbed and all over Merino offer warm, lounge worthy comfort akin to your favorite house slippers but with the proven, long wear durability to explore beyond your comfort zone (and laundry basket) for weeks on end. Material 73% Merino Wool, 25% Nylon, 2% Lycra Spandex