On Cloudflyer 5

The shoe rolls forward more than it bends, which suits steady walking and controlled recovery efforts. Its rocker geometry helps offset the firm foam and provides some forward assistance, but testing found it less flexible than average, at roughly 48.3% flexibility versus a 58.6% comparison average. That stiffness reinforces the guided, stable character, yet can make the heel-to-toe transition feel rigid or clunky. Reviewers differ on comfort, but faster runners are unlikely to find the transition especially lively.

The upper is one of the Cloudflyer 5’s more successful updates. Its engineered mesh with ventilation holes allows good airflow, earning roughly a 4/5 breathability assessment despite added padding. A plush ankle collar, semi-gusseted tongue, smooth lining, and molded heel cup create a secure, comfortable step-in feel. The women’s version uses substantial recycled polyester content, though specifications vary by source. Feedback is mixed on fit: some find the forefoot roomy, while prior Cloudflyer users report a tighter vamp and less plush fit.

Stability is the shoe’s clearest strength, especially for runners who prefer guidance without a traditional medial post. The wide landing platform, firmer medial foam, and 3D-molded heel counter keep the foot secure, while the extended firm foam helps limit unwanted movement. Its measured torsional resistance of 14.8 N supports that structured feel. This can work well for mild overpronation, heavier runners, or long periods standing, although the rigid rearfoot and sharp heel geometry may feel harsh for some heel strikers.

The Cloudflyer 5’s geometry favors heel strikers and controlled transitions. A 31 mm heel stack sits above a 21–22 mm forefoot, creating a 9–10 mm drop that reduces calf and Achilles loading for some runners. The rocker helps roll the shoe forward, but the higher heel does not make it soft or especially fluid. Reviewers generally appreciate the protective platform and flatter touchdown, while some find the heel bevel and posterior flare awkward, particularly during slower rearfoot-led running.

This is a support-first shoe rather than a speed-focused trainer. At roughly 10.6–11.3 ounces for men’s sizing and about 8.8 ounces in the listed women’s size, it carries substantial structure underfoot. The broad platform, dense Helion foam, and molded heel contribute to dependable stability, but also create a clunky heel and muted push-off. Reviewers tend to favor it for walking, gym use, recovery, and easy three- to four-mile outings, with limited enthusiasm for speedwork or racing.

The Cloudflyer 5 feels protective but distinctly firm underfoot. Its dual-density Helion™ midsole uses a firmer heel layer, measured around 28.0 HA, with softer foam toward the forefoot, while CloudTec elements and a rocker add some impact management. That setup supports steady easy miles, walking, and recovery, but lab testing found relatively low shock absorption and 48.3% energy return. Experts and reviewers generally agree it lacks bounce, so On’s cushioning language may overstate plushness for runners expecting a lively daily trainer.

The Cloudflyer 5 makes its priorities clear: firm cushioning and dependable control come before speed or softness. Its broad platform, medial guidance, and molded heel provide secure landings, while the 31mm heel and 9–10mm drop suit heel strikers and runners who appreciate structured support. The tradeoff is substantial weight—roughly 10.6–11.3 ounces per men’s shoe—and a rigid heel that experts and users describe as clunky, especially when pushing the pace. Its engineered-mesh upper is breathable and comfortably padded, though forefoot fit feedback is inconsistent. The rocker helps the shoe roll forward, but limited flexibility keeps transitions controlled rather than lively. That makes it a sensible choice for walking, recovery, easy miles, and extended standing—not racing or energetic daily training. The Cloudflyer 5 earns its premium price through stable guidance, secure heel lockdown, and reliable traction, but its muted ride limits broader appeal.