Columbia Bugaboot Celsius Boots Size 11 Gently used With thermal-reflective linings and plenty of insulation, the kids' Columbia Bugaboot Celsius boots will keep toes warm and toasty. Plus, the bungee lace systems make it easy to gear up for snow days. Waterproof polyurethane-coated leather and textile uppers Omni-Tech™ waterproof/breathable construction Omni-Heat™ reflective linings 400 g insulation Bungee closure systems Injection-molded rubber shells/outsoles