If you thought they couldn't get any better, ASICS GEL-Kayano 22 running shoes will prove you wrong by delivering a more comfortable fit than ever before. A smooth, plush foot environment will help you enjoy your run so much more thanks to the supportive Heel Clutching System™ and adaptable FluidFit® upper that hug the foot and better improve the fit. A combination of ASICS' best technologies in the midsole creates shock absorption, fluid transitions and increased stability throughout your gait cycle. Moderate to severe overpronators will benefit the most.Upper: FluidFit® combines multi-directional stretch mesh with stretch reinforcements that adapt to the athlete's foot, creating a truly customized glove-like fit. Heel Clutching System™ exoskeletal heel counter provides improved support and creates improved heel fitting environment. Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit.Midsole: FluidRide™ provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Dynamic DuoMax® Support System enhances stability and support, with reduced weight and increased platform comfort. Impact Guidance System (I.G.S®) employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. Rearfoot and Forefoot GEL® Cushioning Systems attenuate shock during impact and toe-off phases, and allows movement on multiple planes as the foot transitions through the gait cycle. ComforDry™ X-40 Sockliner provides cushioning performance and anti-microbial properties for a cooler, drier, healthier environment. Removable insole. Outsole: Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. AHAR® (ASICS High Abrasion Rubber) placed in critical areas of the outsole offers exceptional durability and traction.