Due to the layer of fleece lining inside these winter boots, we recommend going up one size from your child’s current shoe size. WATERPROOF: Conquers rain, snow, slush & puddles! Made with DWR coated neoprene over durable rubber. Fully waterproof, works as a great pair of cozy rain boots for your toddler. LIGHTWEIGHT: Not clunky like your typical winter boot WARM: Lined with Sherpa fleece for a snug and comfortable fit. Extra insulation layer helps keep feet warm in snow & slush. Rated -10 Degrees C/ 14F with socks on. EASY-ON: Simple finger holes & back pull tab helps toddlers put on these boots all by themselves MACHINE WASHABLE: Machine washable on gentle cycle cold to lukewarm.