Girls' Northside Little Kid & Big Kid Frosty Winter Boots Looking for a winter boot that minimizes the fuss and hassle, but maximizes cold weather fun? Well, then look no further than the Frosty snow boot by Northside®! This best selling boot has everything you need to keep those little feet warm such as a layer of lightweight Thinsulate™ insulation that holds body heat in, but still allows moisture to escape.