MuckBoots Arctic Sport II Boot (Toddler/Little Kid/Big Kid) Rubber Imported Reaching more than 10 inches high, this is the warmest boot Muck makes for children, rated at minus 40 degrees Dry, comfortable and warm with low profile outsole A great boot to wear hunting with dad, or to play outside on a snowy cold day Comfort Range: -40F to 40F Warm fleece lining, 5mm CR flex-foam, Self cleaning ribbed outsole