Okamoto Nugenai Cocopita Warm Material Moisture-Absorbing and Heat-Generating Sneakers 3-Pair Set - Women's 23-25cm Stays on all day long. No worries. These are the "Cocopita" foot covers that don't slip off. Have you ever had the experience of your foot covers slipping off when you're wearing shoes, running, or taking your shoes off? Having to put them back on in front of people repeatedly, or having the foot covers bunch up inside your shoes... Cocopita makes it so they "don't slip off"! The "U-shaped stopper" that 96% of people have experienced securely wraps the heel, so they won't slip off even when you run or take your shoes off. Convenient for choosing ones that are hard to see with your shoes, and for bulk purchases.