Okamoto Nugenai Cocopita Warm Material Pile Sole Moisture-Absorbing and Heat-Generating Slightly Deep Cut 3-Pair Set Women's Medium Black Small Size 21-23cm Material Composition: Cotton, Rayon, Others Care Instructions: Machine Wash Pattern: Solid, Check About this product SIZE: 21-23cm Description Won't come off all day long. Doesn't bother you. These are the "Cocopita" foot covers that don't come off. Have you ever had the experience of your foot covers coming off when you're wearing shoes, running, or taking off your shoes? Having to put them back on repeatedly in front of people, or having the foot covers bunch up in your shoes... Cocopita achieves "doesn't come off"! The "U-shaped stopper" that 96% of people have experienced firmly wraps the heel, so they won't come off even when you run or take off your shoes. Convenient for choosing ones that are hard to see with your shoes, and for bulk purchases.