Today marks the global launch of the On Cloudmonster 3 Hyper LS, and On is making a bold statement: the era of heavy max-cushion shoes is over. Available at £240, the Hyper LS variant of the Cloudmonster 3 represents a significant departure from its predecessor, shedding weight while maintaining the aggressive cushioning that made the original a favorite among marathon marathoners and neutral-ground runners seeking maximum comfort without sacrificing responsiveness.
The headline innovation is LightSpray technology, On's new lightweight spray-applied cushioning layer that replaces traditional foam structures in select zones. The result is a shoe that's conspicuously lighter than the Cloudmonster 2 while maintaining stack height and energy return. In the context of marathon training, where cumulative impact stress compounds over 20+ miles per run, shedding grams matters. The Hyper LS comes in at just under 330 grams for a men's size 10—a meaningful reduction that translates to less fatigue in the latter miles.
On has also refined the Cloudmonster 3's geometry. The midsole now features a more pronounced heel-to-toe transition than its predecessor, which some testers found created a slightly jarring sensation. The new version smooths that transition while maintaining the aggressive stack that defines the Cloudmonster line. The upper has been reworked with what On calls "adaptive mesh," designed to provide a locked-down fit without the constraint some runners found restrictive in the Cloudmonster 2.
The timing of the Hyper LS launch positions it squarely against competitors that dropped earlier this month. The Hoka Mach 7 arrived with an emphasis on lightness and versatility for track-to-road runners. The New Balance Ellipse launched with similar DNA—a stripped-down, efficient platform for distance runners who want support without bulk. On is telling the market something clear: you don't have to choose between cushioning and speed anymore.
The Cloudmonster 3 Hyper LS is aimed at a specific demographic: marathon runners and long-distance specialists who've always felt the Cloudmonster line was too heavy for their faster-paced workouts but too comfortable to abandon during long runs. This shoe bridges that gap. If you've ever loved the Cloudmonster for its reliability on Sunday long runs but craved something lighter for tempo work, the Hyper LS is your answer.
Initial feedback from beta testers has been enthusiastically positive, though some warn that the LightSpray technology requires a break-in period. The spray-applied cushioning behaves differently than traditional closed-cell foam in its first 10-15 miles, with some testers reporting it feels slightly firmer initially before settling into its designed ride. That's not necessarily a drawback—it just means patience is required before judging the shoe's true character.
At £240, the Cloudmonster 3 Hyper LS undercuts the Hoka Mach 7 by approximately £40 while offering more cushioning. It represents a genuinely thoughtful evolution in the max-cushion category. On has managed the difficult feat of making a shoe simultaneously lighter, more responsive, and no less comfortable than its predecessor. For marathon runners tired of choosing between protection and pace, the Hyper LS arrives at exactly the right moment.