MATERIAL: 65% Merino Wool, 18% Acrylic Fiber, 15% Nylon, 2% Spandex. These premium wool socks for men and women are warmer &softer than regular socks. HIGH QUALITY: Silver ions in the yarn to keep feet clean and dry. Temperature regulating, smooth toe construction, arch compression, longwearing, superior strength and durability, soft, thick, cushioned throughout for all day comfort. SOFT&COMFORTABLE: 65% Merino wool blend ensures comfort all day. The 1/2/4 pack of crew cut socks provide compression, arch support and reinforced heel and toe to ensure maximum comfort and protection. The rib knit design gives elasticity and an elastic cuff prevents bunching MOISTURE CONTROL: Merino wool’s natural properties make it wicking during hot or cold weather. Naturally wicks away sweat which quickly evaporates to leave you comfortably dry. BEST OUTDOOR SOCKS IN THE WINTER: Merino socks work great with casual, snow, hunting, hiking boots & shoes. It?? absolutely the best choice when you are going camping, hiking, trekking, hunting, climbing and mountaineering in cold weather. WASHING TIPS: These socks are simple to care for! Machine Wash cold and drying. But item will shrink if left in the dryer for too long. Almost all wool material will shrink. Best is to wash cold inside out and then air dry to reduce shrinkage. Or you can buy a larger size. Minor pilling of wool is common with wool yarn.