Rain and snow won't slow your child down when they're wearing the Muck Youth Arctic Sport II Rubber Boot. The durable, natural rubber shell ensures total waterproof performance, while the fleece lining adds an extra layer of warmth next to the skin. Stretch-fit topline bindings snug to calves to keep warmth in and cold out. The 5mm CR flex-foam bootie with four-way-stretch nylon promotes lightweight flexibility, while the breathable Airmesh lining wicks away perspiration so feet stay dry. The removable 6mm Nitracel EVA sockliner adds extra support and slipper-soft molded comfort in the footbed. The boot's hands-free design allows for easy on and off. The Arctic Sport II Rubber Boot offers a comfort range from sub-freezing conditions to 85°F. Medium width. Imported.