- Size: 30/31 • Non-slip and quick-drying: The non-slip rubber sole is flexible and protects feet from rocks and stones. Neoprene fabrics allow for quick drying. • Elastic and breathable fabrics: Highly elastic and breathable fabric with strong moisture absorption. The upper part is made of neoprene and rubber, while the interior is polyester, providing comfort and breathability. • Easy to put on and take off: The elastic cuff at the top and the loop at the heel make it easy to adjust and put on the shoes. • Size: Measure your baby's foot size before buying and choose the correct size according to our size chart. • Multi-purpose shoes: Ideal for water park, beach, swimming, pool, hiking, jogging, fishing, yoga, and dancing. Perfect for family outings.