Durable and waterproof high cut kids' shoe with Solarcore® insulation. Viking's newest addition, Solarcore® combines NASA-developed technology with an ultra-thin material that gets warmer when compressed. This means that your child will be radiating heat with every step. A full rubber outsole with deep lugs helps ensure unbeatable traction. Additionally, the upper is fitted with toe and heel reinforcements for all-around protection. For easy adjustment the boot has dual velcro fasteners.