Heavy hitters and severe overpronators will appreciate the cushion and support of ASICS GEL-Fortify running shoes. The new Maximum Support last provides more depth and width throughout the mid- and forefoot for runners with higher volume feet or who may wear orthotics. You'll feel incredible comfort through your gait cycle.Upper: Heel Clutching System™ exoskeletal heel counter provides improved support and creates improved heel fitting environment. Biomorphic Fit® stretch material is strategically placed on the upper to help reduce buckling and the potential for irritation. Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit.Midsole: Impact Guidance System (I.G.S®) employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. 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. Dynamic DuoMax® Support System enhances stability and support, with reduced weight and increased platform support. Guidance Trusstic System® integrates Trusstic System® construction for enhanced gait efficiency while providing midfoot structural integrity. ComforDry X-40 Sockliner features higher rebound properties while providing excellent moisture management, high-level breathability and antimicrobial properties.Outsole: Guidance Line® vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. DuraSpong® outsole features a blown AHAR® rubber compound for enhanced cushioning and durability in the forefoot.