AVIA Women's Gfc Reina Running Shoe 100% Mesh/Synthetic overlays Imported Rubber sole Shaft measures approximately Low-Top" from arch Full-length dual durometer midsole with Avia's GELfm Cantilever (GFC) system brings exceptional cushioning and shock absorption to every workout. Lightweight air mesh with seamless synthetic overlays for enhanced breathability and flexibility. Full-length, dual durometer compression molded EVA, featuring GELfm Cantilever (GFC) system for superior cushioning. Molded removable super GELfm sockliner. Lightweight, solid rubber outsole with forefoot flex grooves for flexibility and forefoot outrigger for extra lateral stability.