The Cloudrunner line has never been On's fastest shoe—its job has always been to hold up through daily mileage. With the third generation now adding "Max" to the name, that mission gets spelled out even more clearly: the midsole is now built in two layers. The bottom layer uses durability-focused Helion foam, while a layer of Helion HF—the same high-rebound foam found in On's racing shoes—sits on top. Impact absorption during the run is handled by the bottom layer, which takes the wear and tear, while the top layer delivers the bounce-back feel. Rather than asking a single foam to do everything, each material sticks to what it does best.
The shoe's construction details all circle back to that same word: stability. The collar is rounded into a smooth curve, the tongue hugs snugly over the instep, a Heel Clip locks the heel in place at the back, and the sidewalls are built up higher—all aimed at reining in side-to-side ankle sway during a run. The outsole has also been widened for a larger ground-contact area, paired with a Rocker curve design to smooth out the transition from landing to toe-off.
