Bogs Classic Dinosaur Waterproof Winter and Rain Boot (Infant/Toddler/Little Kid/Big Kid) 100% Rubber/Fabric Rubber sole Shaft measures approximately 8" from arch Heel measures approximately 0.5" Boot opening measures approximately 11" around 100 percent waterproof durable hand-lasted rubber over a four-way stretch inner bootie Max-wick moisture wicking lining Dura fresh odor resistant foot bed Durable non marking rubber outsole Constructed with 7 millimeter neoprene insulation and comfort rated from temperate to -30 degrees Fahrenheit or -34 degrees Celsius