- The GEL-CUMULUS 24 shoe is a versatile everyday trainer for various runners covering different distances. From the upper to the foam underfoot, this shoe feels softer and more responsive. To improve comfort, the upper features an improved heel fit. Meanwhile, the engineered mesh improves breathability to keep your feet cool throughout your run. This smooth distance trainer is also updated with our FF BLAST cushioning. It helps create a softer landing and a more responsive toe-off.