With this shoe, Mizuno strives to care for the environment through materials with low environmental impact, a dyeing method that requires less water, and reduction in CO2 emissions. Featuring Mizuno's most innovative midsole material, this shoe provides a floating-like running experience suitable for high mileage runners. The combination of two layers of MIZUNO ENERZY core, merged with a layer of MIZUNO ENERZY Foam and Mizuno Foam Wave, has resulted in a shoe with unparalleled comfort. The full knit upper and bootie knit tongue secure you foot in place, adding to the supremely comfortable fit. You won't want to take this shoe off. What You'll Love Plush underfoot sensation Bootie knit tongue that secures your foot in place Waveknit upper provides a sock-like fit