Velcro closure makes the shoe more stable and provides total comfort during play and activities at home or away from home. Made of cotton fabrics that are gentle on delicate baby skin and very resistant to abrasion. The lightweight, flexible, nonslip and ventilated sole ensures hygiene and comfort. The shoes have a mark of originality a yellow element in the sole. Slippers are certified and recommended by orthopedists. When choosing a size, refer to the size chart.2516/2616,5/2717,5/2818/2918,5/3019,5/3120/3221/3321,5/3422/3522,5/3623,5 cm.