Upper: Biomorphic Fit® stretch material is strategically placed on the upper to help reduce buckling and the potential for irritation. P.H.F.® (Personal Heel Fit) system uses two layers of memory foam to line the heel collar and mold to the athlete’s heel, creating a personalized fit. Padded tongue for step-in comfort. Mesh upper with synthetic overlays for support and style. Exoskeletal heel counter Heel Clutching System™ provides improved support and a better fit in the heel area.

Midsole: Solyte® midsole material is a lighter weight midsole compound than ASICS standard EVA and SpEVA®. DuoMax® support system utilizes a dual-density midsole system that is positioned to enhance support and stability. Gender specific Space Trusstic System® midfoot stabilizer creates a pocket between the Trusstic System® device and the midsole, allowing for controlled midsole deformation and more efficient foot function. Heel and forefoot GEL cushioning absorbs impacts for added comfort. Impact Guidance System (I.G.S.®) design philosophy employs linked componentry that enhances the foot’s natural gait from heel strike to toe-off. Removable ComforDry™ sockliner provides cushioning performance and anti-microbial properties for a cooler, drier, healthier environment.

Outsole: Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. AHAR® (ASICS High Abrasion Rubber) is placed in critical areas of the outsole for exceptional durability. DuraSponge® blown AHAR® rubber compound is used for enhanced cushioning and durability in the forefoot.

*Recipient of the American Podiatric Medical Association Seal of Acceptance, which recognizes products that have been found beneficial to foot health, and of significant value when used in a consistently applied program of daily foot care and regular professional treatment.

"Simply put, the Kayano is a Titan. Over its 18 iterations the shoe has consistently performed well for our wear testers. This lastest version earned higher marks than any other shoe in our test for comfort, cushioning and stability. The shoe feels like a padded boxing glove you can use to pound out mile after mile, pain-free. Testers raved about the fit – especially in the rearfoot, where a new external heel counter keeps a firm grip on your heel while wrapping your Achilles in cushy padding and soft fabric. Even with the addition, the Kayano is a half ounce lighter than its previous version. Points awarded. Bottom line [the Kayano 18 is] surprisingly light and delivers maximum protection. "