From Retailer’s Website:Style #1869561BEAT THE BLIZZARDYour little one will feel confident in a boot that plays and stomps through the flurries. Packed with 200g of insulation and a tough synthetic material, they'll stay warm and protected. They'll never stumble thanks to the enhanced traction sole.UPPER: PU backed synthetic textile upper. Fleece lining.INSULATION: 200g insulation.MIDSOLE: 2.5 mm bonded felt frost plug.OUTSOLE: Injection molded waterproof thermal rubber shell with multi-directional lug outsole for enhanced traction.Uses: Heavy SnowDisclaimer: There might be dust on the sole due to being tried on in the store.