Khombu Boy's Astro Snow Boot (Toddler) Synthetic Imported Rubber sole Waterproof Rubber Shell To Keep Your Feet Dry And Warm Velcro Closure For That Perfect Fit To Keep Out The Cold Rugged Outsole To Keep Your Feet Away From The Elements Temperature Rated: Tested To Withstand Temperatures Of Up To -20F (20 Degrees Below Zero) Nylex Lined For Added Warmth