Men's Cloudboom Strike 2 U
On's Carbon Racer for the Marathon
The Cloudboom Strike 2 is On's race-day shoe for the half and full marathon. It uses CloudTec Sphere, a newer version of On's cushioning with small openings where the forefoot meets the midfoot so the foam can flex in several directions.
Helion HF foam and a carbon Speedboard give it a fast, propulsive feel, and at 191g (about 6.7 oz) with a 5mm drop it's light enough for goal-race pace. A removable top midsole layer and open-weave upper keep it comfortable over 26.2 miles.
The Technology
CloudTec Sphere
On's newest cushioning design, built to flex and adapt as you run fast.
Helion HF Foam
Light, resilient foam for a bouncy ride.
Carbon Speedboard
A stiff plate that adds pop at toe-off.
Open-Weave Upper
Lightweight, breathable and secure, with a grippy rubber outsole.
Who This Shoe Is For
- Runners chasing a half or full marathon time goal
- Racers who want a carbon-plated shoe with a lower 5mm drop
- On fans ready for race day
Specs
| Drop | 5mm |
| Weight | 191g / 6.7 oz (On listing) |
| Midsole | Helion HF, CloudTec Sphere |
| Plate | Carbon Speedboard |
| Upper | Open-weave |
| Support | Neutral |
| Sizes in store | Unisex, men's 8.5–11.5 |
| Best For | Marathon, half marathon, race day |
| Price | $250 |
Fit note: On makes this as a unisex shoe and lists it in men's sizes. Every foot is different, so come in for a fitting and we'll scan both feet on the Volumental scanner to find your size.