Beefy 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.