Lightweight with Cushion Light and strong with a thin layer of cushioning along base of foot Our most versatile construction True Seamless technology allows for an undetectable seam fusion for an Ultrasmooth invisible feel MidCalf Height A goto working height thats always ready to take on more Composition Knit with 47 Nylon 46 Merino Wool 7 Lycra Spandex The fast action wicking pulls moisture away from skin so no more sweaty stinky socks The soft breathable merino wool has fast drying all weather performance that keeps you cool in the summer and warm in the winter Guaranteed For Life If these socks wear tear or develop holes Darn Tough will replace them No strings No conditions Made in the USA Every pair of socks is knit in Northfield Vermont the perfect testing ground for the finest premium all weather performance socks