Cushees crew socks are Ethically sourced, Ethically crafted and Environmentally friendly American Made for 40 years of Old School Quality for the Modern day. Ideal for tennis or other high impact sports, or for general use when extra cushion is desired. The socks are knit with Hi-bulk Acrylic yarn and use Hi-splice grey yarn in the foot for extra cushioning. The tops are welted so the top will not unravel and will add to long life for the socks. 67% Hi-Bulk Acrylic, 17% Cotton, 15% Nylon & 1% Polyester