ASICS Women's GEL-Kinetic 3 Running Shoe 100% Mesh and synthetic Rubber sole Discrete heel unit takes the Impact Guidance System to a new level thanks to its shock attenuation and stability Asymmetrical lacing design reduces potential for irritation and provides improved comfort and fit Guidance line is a vertical flex groove that decouples the tooling along the line of progression for enhanced gait efficiency Gender specific cushioning provides a cushioned platform feel in the forefoot Biomorphic upper is strategically placed on the upper helps to reduce buckling and the potential for irritation