Carhartt Midweight Syntehtic Merino Wool Crew Sock. Junior's Purple Large (3Y - 5Y). Carhartt technology FastDry wicks away sweat and fights odor. Material is of a REPREVE recycled yarns, that has a temperature regulating blend. With an enhanced heel pocket for a secure fit and a mesh instep for breathability. Also can be worn as a liner. Material blend is 35% merino wool, 35% acrylic, 14% repreve recycled polyester, 14% nylon, and 2% elastane.