ASICS Women's GEL-Aztec MT Running Shoe 100% Synthetic and mesh Rubber sole Anti Gravel Tongue prevents debris from entering the shoe, Trail Specific Outsole provides uphill and downhill traction on all types of terrain California Slip Lasting offers stability and comfort Trusstic System reduces the weight of the sole unit while retaining the structural integrity of the shoe DuoMax Support System enhances support and stability, positioned sport specifically, Removable sockliner accomodates orthotics Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance