The Toddler Alpenglow II Boots provide versatile winter protection and warmth with HEATSEEKER™ insulation and a flexible, toddler-friendly construction. Our waterproof footwear incorporates a variety of advanced waterproofing materials, treatments, and processes. To help keep feet dry, we use internal waterproof membranes and/or adhesive and seam-seal constructions. 200 G Heatseeker™ Synthetic Insulation At The North Face®, We Purchase 100% Of Our Leather From Leather Working Group–Certified Tanneries Sole Unit: Durable Tpr Shell Bottom And Outsole For Traction And Protection From The Elements Upper: Ballistic-Mesh Upper With Waterproof-Leather Overlays Waterproof, Seam-Sealed Construction