Synthetic sole✔FULLY ANTI COLLISION: Closed toe design is a must for daycare, it will protect toddler's little feet from scrape and stubs(Size chart and size choice have adjusted)✔SUPER NON-SLIP: The non-skid soles have excellent traction on slippery surfaces，every step is stable and safe, easy to clean✔CONVENIENT VELCRO STRAP: Easy slip on and take off for little kids themselves, it also can adjust the tightness, keep baby's feet in place✔ULTRA LIGHTWEIGHT: Made from high quality EVA material, it's very flexible, soft and comfortable for walking, your little ones won't want to take them off✔OCCASION: Suitable for daily wear or many outdoor activities, kids can wear them to the beach,swimming pool,school,play on the street or anywhere.