Farm to Feet Socks Size Chart The official sock of the Blue Ridge Marathon-and packed with advanced running technology-the Roanoke combines the odor-fighting, sweat-wicking capabilities of 100% US-grown merino wool with Friction-Free nylon that prevents hotspots in traditional problem areas. The quarter-crew cut provides additional protection at the Achilles tendon without adding any bulk to the ultralight, non-padded design that pairs well with minimalist and zero-drop shoes. Features: - Soft, itch-free Merino wool construction - Naturally quick drying and odor resistant - Helps maintain a constant, comfortable temperature for your feet - Nylon plaiting creates a smooth exterior and low-profile fit - Low-profile instep won't interfere with low-volume shoes - Bottom-of-foot cushioning zones absorbs impact across the entire sole - Half-density cushioning adds softness and wicking performance while keeping sock thickness to a minimum - Seamless toe closure prevents chafing and reduces bulk - Comfort compression from the cuff to the arch creates a precise, supportive fit - Reinforced construction and low-stress seam placement reduce wear and tear - 36% US Nylon, 31% US Merino Wool, 31% US PTFE Nylon, 2% US Spandex - Made in the USA with 100% US-sourced materials