Kids' Ultralight Winter Boots L.L. Bean.

Product details from website: Our lightest kids' boots are warm, sturdy and designed for staying cozy and dry during snowy walks to school or long days of outdoor play no matter the weather. Lightweight polyester upper seals out cold and snow. Cozy fleece lining and PrimaLoft insulation provide reliable toasty warmth. Durable polyurethane toe cap and mudguard fend off puddles, mud and slush. EVA midsole for all-day comfort and support. Slip-resistant rubber outsole with shaped lugs for extra stability during play.