Feetures! Pure Comfort Ultra Light Cushion Low Cut Socks 37% Rayon derived from Bamboo/36% Merino Wool/17% Nylon/7% Polyester/3% Lycra Imported Thin flat-knit construction takes up minimal room in the shoe SnugFit Technology  unique Power Bands of Lycra hug your entire foot for maximum comfort and blister prevention The PerfectToe  no irritating toe seam Durasoft, a unique blend of super soft Merino Wool and Rayon from Bamboo, wicks away moisture and eliminates odors Graduated compression in crew top keeps sock in place and aids circulation 35% Rayon from Bamboo, 34% Merino Wool, 21% Nylon, 6% Polyester, 4% Lycra (Spandex)