Easy to put on and take off while offering the security of laces, this lightweight, flexible, waterproof winter boot features a protective rubber shell and is perfect for the most active little explorers. The North Face Alpenglow IV Winter Boots Kids' Features: Upper: Ballistic nylon with leather overlays Cemented and seam-sealed waterproof construction Thermafelt Plus removable liner for superior warmth to -25°F Bungee lace and collar for a secure fit and to keep out snow Sole Unit: Lightweight and flexible TPR shell bottom with a TNF Winter Grip® rubber outsole for superior traction and protection from the elements