Worsted-Wool Polyester Nylon 66% Super fine Merino Wool, 24% Nylon, 8% Polyester, 2% spandex No Blister Guarantee Machine Washable, Warm water, No Bleach, Tumble Dry w/ low heat Made in USA Soft Merino wool golf sock with a No-blister guarantee! Cocona fibers cushion the heel and sole to reduce friction and prevent blisters Natural wicking. They keep moisture and sweat away from skin. Tour Profile ankle setting look without slippage or sliding of the sock. IMPORTANT: These are thick socks, and can be tight if your feet size are on the large end of the size range. For example if you wear a size 12 shoe, then we suggest ordering the next size up (XL). Easy Cleaning: Turn socks inside out, machine wash in warm water, tumble dry low