The GT 2130 from Asics features impact guidance system that enhances the foots natural gait from heel strike to toe-off. Solyte Midsole Material which is lighter than the Asics standard EVA and spEVA. Space Trusstic System an advanced system that creates a pocket between the Trusstic System device and the midsole allowing for greater midsole deformation and a more efficient foot function. DuoMax Support System helps ensure that the shoe maintains proper support for the foot during the critical transition from heel strike to toe-off.