AVIA Men's Avi-Pulse II Running Shoe 100% Synthetic Mesh/Synthetic Leather Imported Synthetic sole Air mesh upper with overlays for maximum breathability and durability Gelfom plus premium removable insole with additional arch support and cushioning New and improved gel-RYD heel insert and cantilever design offer exceptional cushioning and shock absorption Solid rubber outsole with forefoot grooves for unimpeded movement