●Infant Shoes Material: Shoes Inner sole are slightly cushioned with cotton for extra comfortable,excellent sweat absorption, breathable. Shoes Outsole is made of rubber which is good at anti-slip and abrasion-resistant. ●Upper use super soft PU on the face which is resistant, smell-less, and easy to clean. ●Safety: No any stimulation to the skin of baby, protect the baby healthy growth. ●Easy on and Off : Unique Velcro Closure Design make our baby slippers easy to put on and off which ensure the walking shoes stay on baby’s little feet perfectly. ●Please refer to the size chart carefully before buying. If you buy by age alone, you may buy inappropriate shoes. size 0-6 months age=11cm/4.33 inches (length from heel to toe); Size 6-12 months age=12cm/4.4.72 inches (length from heel to toe); Size 12-18 months age=13cm/4.5.12 inches (length from heel to toe).