pediped Originals Kate Crib Shoe (Infant) 100% Leather Leather sole XS = 0-6 Months, S = 6-12 Months, M = 12-18 Months, L = 18-24 Months pediped footwear is made from soft, supple leather and lined with pigskin for the ultimate in baby comfort and protection Velcro fasteners make them quick and easy to put on Secure, yet comfortable, they stay on babies' feet Ideal for both indoor and outdoor use, yet still provide the benefit of a true soft sole