Product DetailsASICS rebels against conventional design with its new GEL-Kinsei® 6. The upgraded seamless upper construction supplies superior comfort with improved fit and durability. The premium combination of a Discreet Heel Unit and Propulsion Trusstic® provides a seamless fusion with the runner’s foot. With updated FluidRide® technology, the enduring cushion of the GEL-Kinsei® 6 ensures a lightweight experience for every journey of your run. Heel Height: 21mm. Forefoot Height: 11mm.