Carhartt Heavyweight Synthetic-Wool Blend Womens Crew Sock, Jade Green, 4-pack. Made of a soft knit, featuring extra cushioning at the heel, arch, and toe. Abrasion-resistant yarns that provide extra durability. Fights odor, and the synthetic-wool blend is temperature-regulating. Synthetic blend materials made of 55% polyester, 19% acrylic, 12% nylon, 12% wool, and 2% elastane.