Asics - Gel-Kayano X (White/Lightning/Black) - Men's: Celebrating 10 years of consistency, the Gel-Kayano X continues as a high mileage trainer, yielding the very best blend of cushioning and stability through ASICS proprietary I.G.S. technology. A stable running shoe designed for mild to moderate over-pronators. I.G.S (Impact Guidance System) combines all ASICS components to enhance the foots natural gait from heel-to-toe. DuoMax medial post provides stability and shores the midfoot. Full length SpEVA midsole material for increased shock attenuation and midsole durability. GEL cushioning systems for maximum rearfoot and forefoot shock attenuation in all planes of motion. Biomorphic upper fit provides a superior fit and function. Shoe weighs 12.8 oz.