Impact Guidance System (I.G.S.) Asics design philosophy that employs linked componentry to enhance the foot's natural gait from heel strike to toe-off. Guidance Line. Vertical flex groove decouples the tooling along the line of progression for enhanced gait efficiency. Space Trusstic System. This midfoot stabilizer creates a pocket between the Trusstic System device and the midsole, allowing for controlled midsole deformation and more efficient foot function. ComforDry Sockliner Provides cushioning performance and anti-odor properties for a cooler, drier, healthier environment. Biomorphic Fit upper Stretch material strategically placed on the upper helps to reduce buckling and the potential for irritation. Asymmetrical Lacing Design. An anatomically correct lacing environment that reduces potential for irritation and provides improved comfort and fit. Discrete Eyelets. Independently placed eyelets disburse lace tension, creating a customized fitting environment and enhanced upper comfort.