This is the highly cushioned high mileage road shoe for any neutral runner. Superior performance on both roads and treadmill. The Kinsei 6 pushes the boundaries of footwear science. IGS - Imapct guidance system, is a technical shoe design philosophy that allows the athletes foot to perform in a more natural manner. Asics high tech IGS shoes are constructed in a way that enhance natural gait.Biomorphic Fit Upper: Stretch material strategically placed on the upper helps to reduce buckling and the potential for irritation.Propulsion Trusstic - The Asics propulsion Trusstic System mirrors the functions of the ligaments in the foot. It halps the foot transofm from a flexible structure, for shock absorption through the heel strike and mid-stance, into a powerful, rigid lever needed for forward propulsion.Rearfoot and Forefoot Gel Cushioning - Attenuates shock during impact and toe off phases, and allows movement in multiple planes as the foot transitions through the gait cycle.Removable Sockliner - EVA sockliner moulded to the shape of the foot, which can be removed to accommodate a medical orthotic.Clutch Counter - Exoskeletal heel counter provides improved support and creates improved heel fitting environment.Guidance Line - Vertical groove decouples the tooling along the line of progression for enhanced gait efficiency.