Non-Mulesed Merino Wool Blend Our ethically sourced, non-mulesed Merino Wool blend makes for a naturally breathable, soft, itch-free sock. HeiQ Antimicrobial These socks are treated with a silver-based HeiQ compound for antimicrobial and odor control. Made in USA This sock is manufactured in the USA using imported fibers. Seam-Free Toe Our seam-free toe design helps reduce bunching and blisters. Cushion and Venting Targeted cushioning where you need it in addition to ventilation channels to help regulate temperature. Arch Support 54% Merino Wool, 42% Nylon, 4% Lycra Spandex Crew, Grey