1Comfortable material, prevent the sole of the foot from rubbing directly with the shoe or the floor, relieving the pain caused by friction. 2Suitable for all kinds of shoes, space-saving, convenient to wear and store. 3Made of nylon material, super wear - resistant, suitable for dancing wearing. 4Breathable and can better protect your feet, comfortable to wear. 5There are 4 different sizes available, suitable for different foot size to wear.