Butler Boot Kids' Butler Emperor Supreme-K 100% Thermoplastic Elastomer Rubber sole Shaft measures approximately 7" from arch Boot opening measures approximately 10" around 100% waterproof boot featuring hook-and-loop velcro closure Temperature rating of -40 degree c with the liner, -30 degree c without Accordion-style entry for easy on and off Machine washable / breathable liner Warm in the winter, cool in the summer