Socksmith Mens Crew Socks "Paleo" Charcoal Heather - One Size Cotton Blend Socksmith men's Paleo novelty crew socks. Charcoal grey socks with a red toe, heel and cuff featuring a cartoon caveman character design. Toe Seam. Fiber Content: 70% Cotton, 27% Nylon, 3% Spandex. Sizing: Sock size 10-13 will fit a men's shoe size 8-13.