The ASICS® GEL-Evolution® IV running shoe with its broad supportive platform, enhanced midfoot structure and larger toe box provides a supportive ride without compromising flexibility, comfort and exceptional upper fit. Biomorphic Fit™ upper provides a superior fit and 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. Impact Guidance System® (I.G.S) uses linked componentry that enhances the foot's natural gait from heel strike to toe-off. Solyte™ midsole material is lighter than standard ASICS® EVA and SpEVA® combined with improved cushioning and durability. Space Trusstic® system: an advanced system that creates a pocket between the Trusstic® system device and the midsole, allowing for greater midsole deformation and more efficient foot function. Wt. 13.4 oz.