Biomorphic Fit™ upper offers enhanced upper fit and comfort while decreasing the potential for irritation. Solyte midsole material is lighter than standard EVA and SpEVA® combined with improved cushioning and durability. Impact Guidance System (I.G.S.®) uses linked componentry to encourage optimal gait while allowing for natural foot movement from heel strike to toe off. DuoMax® support system helps ensure that the shoe maintains proper support for the foot during the critical transition from heel strike to toe off. Space Trusstic® System creates a pocket between the Trusstic® System device and the midsole, allowing for greater midsole deformation and more efficient foot function. GEL® Cushioning System provides maximum rearfoot and forefoot shock attenuation. Wt. 12.6 oz.