On Unveils the Cloudboom Strike 2, Its Most Refined Marathon Racer Yet

On just dropped the second generation of its Cloudboom franchise, and this one carries real weight for anyone who follows race-day shoe design closely. The Swiss brand calls it the Cloudboom Strike 2, and it arrives in two builds: a standard version and a LightSpray edition that treats the upper less like fabric and more like a second skin sprayed directly onto the last.

What Changed Under The Hood

The headline update is CloudTec Sphere, On's evolved take on its signature cushioning geometry. Instead of the hollowed-out cloud pods from the first Cloudboom Strike, the midsole now runs as segmented foam channels that let the platform flex more naturally through toe-off. Paired with it is Helion HF, a hyper foam tuned 15 percent lighter than the outgoing version, and the Speedboard, On's carbon plate that handles propulsion. Together these three pieces form the core of what On is positioning as a marathon shoe built for the back half of the race, not just a fast start.

That distinction matters. On's engineering brief reportedly centered on sustaining pace deep into 26.2 miles rather than chasing peak speed in the opening miles. It's a subtle shift in philosophy, one that separates this generation from shoes designed purely around a 5K time trial mentality.

Two Silhouettes, One Mission

On LightSpray Cloudboom Strike 2 "White Yellow"

Style Code—

Release DateJul 30, 2026

Retail Price$310

The LightSpray build remains the more radical of the pair. Built through On's robotic spray process, the upper forms as a single continuous filament wrapped around the last, cutting weight and eliminating traditional seams entirely. It's a construction method that still feels closer to a lab experiment than mainstream footwear manufacturing, even a few years after its debut.

The standard Cloudboom Strike 2 keeps things more conventional with a breathable mesh upper, aimed at runners who want the same platform without the LightSpray premium or the more aggressive lockdown fit that comes with it.

On says the shoe's tuning drew on data from elite roster names including Hellen Obiri, Yeman Crippa, and Joe Klecker, all of whom have logged serious marathon mileage in early builds ahead of launch.

On Cloudboom Strike 2 "Green Purple"

Style Code—

Release DateJul 30, 2026

Retail Price$250

Colorways And Release Details

Two colorways lead the rollout. The LightSpray Cloudboom Strike 2 launches in a White and Yellow combination, while the standard Cloudboom Strike 2 goes with a Purple and Green pairing, a loud choice for a race shoe but one that fits On's recent tendency toward bolder colorways on its performance line.

Both models release Wednesday, July 30, through On.com and select premium running retailers. Pricing sits at 250 USD for the standard build and 310 USD for the LightSpray version, reflecting the added manufacturing complexity of the sprayed upper.

For anyone chasing a PR this fall, the Cloudboom Strike 2 lineup gives two distinct paths into the same platform: one built around accessibility, the other around pushing what a racing upper can actually be.