Mizuno Wave Horizon 8 vs On Cloudmonster 3:
Which to Choose

Start with the specs that actually diverge. The Horizon 8 is the taller and heavier of the two, with a 42 mm heel / 34 mm forefoot stack and an 8 mm drop at about 323 g in a men's 9, versus the Cloudmonster 3's 39 mm / 32 mm stack, 7 mm drop, and 301 g. That extra height and weight on the Mizuno go toward genuine stability support: it's a structured stability shoe built for mild-to-moderate overpronation, using a wide base plus the nylon Wave plate to organize the landing and keep the soft ENERZY foam composed. The Cloudmonster 3 is stable-neutral — planted and predictable thanks to a broad platform and TPU Speedboard, but with no medial post — so it guides the foot by geometry rather than actively correcting it. Foam feel is the other clear split: the Horizon's ENERZY rides soft and cushioned but controlled, while the Cloudmonster's Helion is distinctly firm, sitting you on a big platform that stays composed but can feel a touch dead at very slow jogging paces. Neither is a springboard — both score the same modest responsiveness, and both rely on a composite plate for structure rather than carbon-plate pop, so neither rewards sudden tempo accelerations. Where they fully agree is purpose: cushioned long-run and steady-mileage tools whose sweet spot is relaxed effort, with the Horizon happiest around 5:00–5:15 min/km and the Cloudmonster around 5:15–5:30 min/km before the weight and controlled rebound rein them in.