Tactile socks from Chup in a thick wool blend, carefully composed to reduce the use of synthetic fibres. Made in Japan on traditional stocking frame machines. Avoid wearing immediately after washing to extend the lifespan, and turn the socks inside out occasionally to reduce friction. Wool socks. Made in Japan by Chup. Details 89% wool, 10% nylon, 1% polyurethane. Wash inside out inside a washing net at 30 degree. Do not tumble dry. Made in Japan. Fits sizes 40 - 43.