Rototo Washi Pile Crew Socks - Dark GreenThese WASHI PILE CREW SOCKS are made of crisp Washi (Japanese paper) yarn, featuring refreshing pile lining. Made out of natural Manila hemp fiber that is also used to make paper currency, the Washi yarn has excellent water absorbent and moisture wicking properties. Although it is usually difficult to pile knit Washi yarn, a special machine and artisanal craftsmanship have made it possible. * Avoid tumble drying, as it may cause shrinkage. MATERIAL