Thorlos Mens Merino Silk Lite Hiking Crew Moderate Cushion-3-Pair Pack Nylon^Polyester^Spandex^Wool Made in USA Keep your feet happy on your next day hike with the Thorlos&reg; Merino Silk Lite Hiking Crew Moderate Cushion 3-Pair Pack! Sold as a three-pair pack. Crew sock length sits at calf. Designed for feet that hurt during or after hiking so that protection and comfort from blisters, foot pain, or discomfort is tended to. Exclusive wool/silk blend construction for insulation and superior moisture management for better dry feet. Spandex provides support. Light cushioning at the instep and arch protect against lace pad pressure. Ventilation panel for better wicking. Padding under the ball and heel is clinically proven to offer maximum protection from friction to limit growth of blisters. Low profile toe seam won't irritate feet during trail hikes. 31% wool, 20% acrylic, 18% polyester, 14% nylon, 12% silk, 5% spande