Carhartt Men's Heavyweight Steel Toe Boot Sock - Carhartt heavyweight merino wool blend steel toe boot socks deliver lasting comfort with moisture-wicking, odor-fighting technology to keep feet dry and fresh. Built-in arch support and a stretchy top provide a secure, comfortable fit for long days on your feet. Features 57% Merino wool / 19% acrylic / 13% nylon / 10% polyester / 1% elastin; FastDry; Arch Support Steel Toe Protection;