Men's socks, size 25, made of acrylic and nylon blend, set of dark gray and navy. - Size: 25 - Materials: Acrylic, Nylon, Wool, Polyester, 100% Cotton - Colors: Dark Gray, Navy One pair is 100% cotton. Please note that the other two pairs are not 100% cotton. These were found while organizing my parents' house. Please understand that these have been stored at home for a long time, and only purchase if you are okay with that. Thank you for looking.