The GEL-CUMULUS 23 MK shoe helps you focus on the distance ahead as you move towards your personal best. It's a high-mileage trainer that's 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 updated GEL technology unit in the heel that allows your feet to experience cloud-like comfort. Meanwhile, the FLYTEFOAM cushioning keeps the shoe lightweight and propels your stride forward with a smooth transition.