Developed for the coldest days of the year, Frost Fighter can be summed up in two words - ultimate warmth. This insulated thermo boot is Viking’s warmest kids model and can keep small feet warm and happy down to an impressive -30 °C. It does so by combining the high quality, lightweight and insulating polyurethane called Elastopan® with an ultra-warm wool and polyester lining. Elastopan® is a 100 percent PVC-free, that contains millions of tiny air bubbles and provides 2.5 times more insulation than normal PU boots, while being twice as durable. An elastic band around the cuff helps lock in heat and keeps snow and debris out, while an extra thick PU sole grips well and makes sure there is plenty of space between the feet and the cold ground. When temperatures plunge, there is no warmer boot for kids than the Frost Fighter.