Named for the man who first brought Merino Wool to Vermont. High-density cushioning throughout the entire sock for full-on comfort and performance. 67% Merino Wool, 31% Nylon, 2% Lycra spandex blend provides breathable comfort in all conditions. Naturally antimicrobial to repel bacteria and odors. One pair. Men's size: M (8-9.5), L (10-12) or XL (12.5-14.5). Darn Tough William Jarvis Full Cushion Men's Boot Socks