[Organic cotton slub yarn]
With help from a spinning mill in Osaka, ROTOTO created this yarn after repeated trials in selecting the blend and thickness of the yarn as well as the slub width. Each yarn is carefully and slowly spun by skilled operators with an old spinning machine that has been used since the 1950s.
[Recycled polyester yarn]
This yarn is made from recycled plastic bottles once used in Japan. Because they would like these socks to be worn for a long time, they actively use highly transparent materials to ensure its eco-friendliness, quality and traceability.
Avoid tumble drying, as it may cause shrinkage.