Underpronators to neutral runners will enjoy the superior comfort and improved fit of ASICS GEL-Kinsei 6 running shoes. The latest update features an upgraded, seamless upper and even more reliable durability. They ensure a lightweight run with bounce back and luxurious cushion.Upper: FluidFit® upper technology combines multi-directional stretch mesh with stretch reinforcements that adapt to the foot, creating a truly customized glove-like ft. Discrete Eyelets dispense lace tension, creating a customized fit environment and enhanced upper comfort. Heel Clutching System™ exoskeletal heel counter provides improved support and creates improved heel fitting environment. Seamless Construction reduces the potential for irritation and friction caused by traditional stitches and seams. Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit.Midsole: Impact Guidance System (I.G.S®) employs linked componentry that enhances the foot's natural gait. FluidRide® provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Rearfoot and Forefoot GEL® Cushioning Systems attenuate shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle. Propulsion Trusstic® mimics connective tissue in the foot by creating tension as the foot enters propulsion stage. ComforDry™ X-40 Sockliner features higher rebound properties while providing excellent moisture management, high-level breathability and antimicrobial properties. Gender-Specific Cushioning features a lower-density top layer in the midsole, allowing female athletes to better enjoy the benefits of midsole compression. Outsole: Discrete Heel Unit™ takes the Impact Guidance System to a new level by creating ASICS's highest degree of shock attenuation and stability. AHAR® ASICS High Abrasion Rubber is placed in critical areas of the outsole for exceptional durability. Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency.