NIKE Women's Viale Running Shoe 100% Leather and Synthetic Imported Rubber sole Shaft measures approximately low-top from arch Ultra-light design inspired by marathon runners. Mesh upper allows for breathability. Outsole lugs surround a hollowed core to optimize stability. Injected foam (IU) midsole for cushioning and long-lasting comfort Microbranding on the tongue middle. Hidden branding under the heel tab -- lift up to see a Swoosh design trademark underneath.