A high mileage trainer, the ASICS GEL-Kayano X yields the very best blend of cushioning and stability through the I.G.S.® (Impact Guidance System), which directs the foot from heel to toe, allowing for a more natural gait. Designed for the runner who has a medium to large frame and medium to low arches, this shoe features a SpEVA® midsole that reduces shock and adds durability as well as visible rearfoot and forefoot "twist" GEL® Cushioning Systems for maximum shock reduction. The dual-density DuoTruss® System links the forefoot and rearfoot for added support. DuoMax® medial post offers stability and shores the midfoot. Synthetic leather upper with open air mesh. PHF® (Personalized Heel Fit) memory foam-lined heel collar molds to the heel. Biomorphic Fit™ upper provides superior fit and function. Combination DuoSole® and DuraSponge® outsole with AHAR® heel plug and lateral flex grooves add stability and flexibility. Weight 11.2 oz.