Lightweight Everyday Alpaca Socks perfect for First Responders as well as for everyday work, hiking, biking, and skiing. First Responders love this sock because it is a Class 1 Flame Resistant fiber for maximum confidence in extreme conditions! The light weight of the alpaca reduces bulkiness and keeps your feet dry and comfortable. Alpaca wicks so well it is practically waterproof. It insulates 30% better then Merino wool in any conditions warm-cold with no itching or prickly feelings. Silver technology means no odor and no sweat, and they help prevent athlete’s feet. Crew and Over-the-Calf styles in both tan, olive and black (limited) colors. Alpaca does not itch like wool!! Made in the USA.