Rototo Organic Cotton Slub Crew Socks - Light BlueThese slub socks combine two types of yarn to create a melange like texture that resists visible dirt and pilling, even with repeated wear. The base is made from environmentally conscious organic cotton, while the slub yarn is an original blend developed in collaboration with a Japanese spinning mill using organic cotton. *Avoid using a tumble dryer, as it may cause shrinkage. MATERIAL 93%COTTON, 5%NYLON, 1%POLYESTER, 1%POLYURETHANE COUNTRY OF ORIGIN