One boot for the whole school year. Our bestselling waterproof boot for kids is ready for winter. We added 100g of insulation plus a thermal lining to keep little feet toasty in colder weather. Same easy on/off design and comfort kids love.Features100g of KEEN.WARM insulation rated to -4°F/-20°CKEEN.DRY waterproof, breathable membraneEco Anti-Odor for natural odor controlPFC-free, durable water repellentMaterialWaterproof leather upperHigher-traction rubber outsoleFleece lining for warmthThermal Heat Shield insole captures warmthTechnologiesKEEN.DRYA proprietary waterproof, breathable membrane that lets vapor out without letting water in.KEEN.WARMWho knew charcoal bamboo could create something that keeps your feet warm? But it makes KEEN.Warm—a lightweight insulation that provides warmth where you need it most.