The Muck Boots Youth Total Eclipse Charcoal Tremont Childs Boot is simply stated, the fashionable wellie that will keep your tween's feet warm and dry in a variety of wet and wintry conditions. Perfect while sledding, playing in snow or puddles. Features include a 4mm CR Flex-Foam insulation, a warm fleece lining, a dual density EVA Insole with a gel cushion insert and a low heel. Matte Finish. COMFORT RANGE: -20 degrees f to 50 degrees F.