The GEL-CUMULUS 23 MK shoe helps you focus on the distance ahead as you move towards your personal best. Its a high-mileage trainer thats designed to make your stride smoother and your mood brighter. This version is also formed with a MONO-SOCK upper that gently hugs your foot in key support zones. Creating a softer feel underfoot, this shoe features an updated GEL technology unit in the heel that allows you to experience cloud-like comfort. Meanwhile, the FLYTEFOAM cushioning keeps the shoe lightweight and propels your stride forward with a smooth transition.