Versatile, efficient, and odor free, the SmartWool Medium Cushion hiking crew socks now feature wool on wool (WOW) technology for greater durability. . Special fiber blend evaporates and wicks better than synthetics alone to keep your feet drier and more comfortable. Smartwool Merino fibers are naturally odor free. Smartwool fibers regulate body temperature to keep you warm in the winter and cool in the summer. Wool-on-wool construction in the heel maximizes the lifespan of the sock. Medium full-cushioned leg and foot with elastic ribbing that holds sock in place. Flat-knit side panel reduces bunching and maximizes ventilation. Elastic arch brace enhances fit and support. Reinforced light half cushion protects against shock, blisters, and abrasions. Flat-knit toes seam increases comfort and durability.