Designed based on tube socks made in the U.S. in the late 1970s, these ribbed socks are knitted with a special knitting machine that is hard to find today, using low-count supple cotton yarn. The liner of the sole is brushed for a unique bouncy feel that only ROTOTO can create. The simple design fits any types of outfits from skater-like sporty styles to traditional ones. 73% cotton, 12% acrylic, 12% polyester, 3% polyurethane Made in Japan Style R1255 The surface of the sock is quite sensitive to abrasion and can be worn out easily if you wear it with leather shoes. Avoid tumble drying, as it may cause shrinkage. Size Chart: | Size | M | L || -------------------- | --- | ----- || Approx. UK Shoe Size | 7-9 | 10-12 |. Color: blue