Bogs Kids' Durham Solid-K Rain Boot 100% Synthetic Rubber sole Shaft measures approximately 9.5" from arch Boot opening measures approximately 10" around 100 percent waterproof streamlined upper design with rubber trimmed handles Max-wick moisture wicking lining Lined with 5 millimeter neoprene insulation Dura fresh odor resistant footbed Comfort rated to 5 degrees fahrenheit or -15 degrees celsius