RoToTo R1461 Socks in BlackROTOTO R1461 Socks in Black. These socks are made of a linen cotton synthetic blend to enhance comfort and durability, knitted on antique machinery. 54% linen, 38% cotton, 6% nylon, 1% polyester, 1% polyurethane Made in Japan ROTOTO Crafted and designed in Japan, ROTOTO uses traditional and modern manufacturing techniques, to create the ultimate cool comfort sock with the tag line have a good feel. These socks are the epitome of style and fit.