SIZE-Fit women shoe 5-9. FIBER-73% cotton, 25% nylon, 2% spandex. Perfect match your Canvas Shoes Sneakers Loafers, Flats, High heels, etc. STRONG NON-SLIP SILICONE HEEL GRIP to prevent slip off Easy to wash: Machine wash or hand wash. The socks are very strong. You can wash it by hand or by machine. It won’t be a one-off.