Sockwell Men's Graduated Compression Ski Sock 39% Merino Wool, 39% Nylon, 11% Alpaca, 7% Bamboo, 4% Spandex Made in US Moderate (15-20mmhg) graduated compression recommended for everyday wear for prolonged sitting- standing- travel- minimizes swelling of the feet- legs Protective Shin cushion with Achilles cushion with reinforcement at ankle Accu-fit Technology consisting of Spandex throughout the sock ensures same fit at the end of the day as when it was first pulled on Promotes circulation, minimizes swelling, and helps reduce fatigue Alpaca blend adds additional durability and thermoregulation and ultra-light cushion sole provides comfort and great fit High Performance and Lambswool/Alpaca -Enhanced natural moisture management -Natural odor control -Enhanced natural Thermoregulation 15-20mmHg Moderate Graduated Compression 3 zones of gradient compression pushes blood upward; Cushion Shin Pad Protection Promotes healthy circulation and reduces fatigue Seamless toe seam, and mesh breather panels, for comfort