Columbia Child Powderbug Forty Print Winter Boot (Toddler/Little Kid) 100% Textile and Synthetic Imported Rubber sole Shaft measures approximately 7" from arch Boot opening measures approximately 10" around Adjustable hook and loop closure strapWaterproof seam-sealed construction Recycled 6mm washable recycled felt liner Waterproof synthetic leather and nylon textile 400g Insulation Rated -40F