Fabric Imported Rubber sole SpevaFoam 45 Lasting – Employs 45 degree full length SpevaFoam 45 lasting material for a soft platform feel and improved comfort. I.G.S (Impact Guidance System) Technology – ASICS design philosophy that employs linked componentry to enhance the foot’s natural gait from heel strike to toe-off. FlyteFoam Lyte Technology – ASICS lightest weight midsole formulation that provides continuous cushion thanks to organic nano fibers. FlyteFoam Propel Technology – ASICS energetic foam formulation that provides supreme bounce thanks to a unique elastomer compound. Dynamic DuoMax Support System – This evolution of DuoMax system enhances stability and support, with reduced weight and increased platform support.