ASICS Women's GEL-SD-Lyte Running Shoe 100% Synthetic and mesh Rubber sole Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance Open Mesh Upper provides excellent comfort and breathability AHAR High Abrasion Rubber is placed in critical areas of the outsole for exceptional durability Injection Molded EVA offers lightweight and cushioned shock attenuation