CloudLine Merino Wool Hiking & Athletic Crew Socks - Ultra Light - Made in USA This style has an athletic, snug fit to provide extra support when you're exercising, or working on your feet all day. 59% Ultra soft merino wool, 34% Nylon, 7% Spandex. Made from ultra-fine 22.5 micron merino wool. Designed for long-lasting softness. Ultra Light weight merino wool socks with reinforced heel and toe zones for durability and comfort. Quick wicking to keep feet dry; anti-microbial to keep feet fresh; vibrant colors to keep you looking good Lifetime Guarantee. Machine Washable. Manufactured in the USA with ultra soft merino wool. Great for hiking, biking, mountain biking, camping, trekking, trail running, walking or relaxing at a coffee shop. WHY MERINO? Merino wool comes from a species of sheep that produces very fine and soft wool. It is not coarse and itchy like most other wool, but amazingly soft, while still retaining all the other wonderful properties of wool. Your new favorite socks. Buy some today.