Kenetrek Men's Yellowstone Lightweight Hiking Mid Calf Socks - You'll rarely find a lightweight hiking sock with the same reinforced heel/toe protection and strength weaved into heavy duty boot socks… but look no more. Merino wool blend insulates when wet Odor resisting fabric Regulates body temperature from summer into early fall Wicking, long-lasting and built for the trail Style: KE-1220 36% Merino wool, 35% Polypropylene, 20% Nylon, 6% Elastic, 3% Lycra Men's shoe sizes: Medium (5-8), Large (9-12), XL (13-15) Women's shoe sizes: Small (4-7), Medium (8-11) Made in the USA