Icebug Women's Aurora BUGrip Studded Traction Running Shoe 100% Synthetic Imported Synthetic sole Upper: RipStop Nylon / Protective PU / TPU / Weather Shield Lining: QuickDry mesh / TPU weather shield Insock: Removable molded EVA with mesh liner Midsole: Injection molded lightweight EVA Outsole: Rubber with BUGrip 19 carbide tip studs