The Kid's Rugged II is designed with added insulation for the utmost warmth, comfort, and durability for playing outside in the snow all day. The Kids Rugged II will protect your childs feet in severe cold with the 5mm neoprene waterproof bootie insulation backed with a fleece lining. This lining adds extra insulation to keep cold out for kids that want to stay outside playing in the snow all day. The Kid's Rugged II is designed with added insulation for the utmost warmth, comfort, and durability for playing outside in the snow all day. The Kids Rugged II will protect your childs feet in severe cold with the 5mm neoprene waterproof bootie insulation backed with a fleece lining. This lining adds extra insulation to keep cold out for kids that want to stay outside playing in the snow all day.