The Moxy® is our most popular shoe style, and for good reason too! With an elastic T-strap band, the Moxy® is easy to put on and take off while remaining snug to your child's foot. Each shoe is lined with cotton to keep the foot dry and warm. Sizes 4 and up come with a hard sole for any new walking child in your home! MATERIALS - Made from our soft vegan leather. Not to mention, waterproof too! - Hand wash or wipe clean if dirty. SIZING: Size 1 soft sole 0 - 4 months 3.7" Size 2 soft sole 3 - 10 months 4.1" Size 3 soft sole 7 - 15 months 4.5" Size 4 hard sole 1 - 1.5 years 4.9" Size 5 hard sole 1.5 - 2.5 years 5.3" Size 6 hard sole 2 - 3 years 5.7" Size 7/8 hard sole 3 - 4 years 6.3" Size 9/10 hard sole 4 - 5.5 years 6.9" *add 1/2" growing room