# On LightSpray Cloudboom Strike 2 review By Nicolas Brun · 6 September 2026 · Tests ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/19aaca1fd1249efa2ae29630ffa8d8a958ae2c4c-1999x1500.jpg?w=1600) We already told you about [the new Cloudboom generation](https://joliefoulee.fr/en/articles/lightspray-cloudboom-strike-2) when it launched. Since then, Nico has had time to put the **On LightSpray Cloudboom Strike 2** through its paces, and the verdict is blunt: "damn, that's one hell of a shoe." **Tester:** [Nico](https://www.instagram.com/nibrun/)\ **Test length:** over 100 km\ **Test conditions:** road training, race paces **Looks**: on the **[On LightSpray Cloudboom Strike 2](https://www.on.com/fr-fr/products/cloudboom-strike-2-ls-u-3ug3002/unisex/white-verdite-shoes-3UG30025363)**, the one-piece woven upper, with no seams and no laces, gives the shoe the clean, futuristic look that is the signature of the technology. This is a shoe that makes no secret of its ambitions: it's all about performance. A nice little bonus given the price: a pair of socks comes with the shoe, and they finish off the look perfectly, a real plus for a package that feels thought through to the last detail. The box itself goes all in on the tech storytelling: "Welcome to the future of running. By combining robotics and material innovation, LightSpray™ allows us to create a seamless upper in a single step. In just three minutes. The result: our lightest running shoes to date." You can tell the brand doesn't do things by halves, right down to the unboxing. A fun detail we'd never seen anywhere else: the box even includes an illustrated guide to putting the shoe on. Literally: "To put on your LightSpray™ shoe, slide your foot all the way in, then gently pull the heel fabric upwards." With no tongue and no traditional laces at all, the instructions aren't superfluous: the upper is so snug that you'd better know the right move before tackling it for the first time. **Comfort**: Nico's first observation, and not a minor one: the **[On LightSpray Cloudboom Strike 2](https://www.on.com/fr-fr/products/cloudboom-strike-2-ls-u-3ug3002/unisex/white-verdite-shoes-3UG30025363)** is more comfortable than an Adidas Adios Pro 4, with a less narrow fit. For a pure racing shoe, that's far from a given. Another reassuring point about the durability of the LightSpray tech: after more than 100 km, the upper hasn't budged an inch. It's still a racing shoe, not built to soak up big daily mileage, but it takes the kilometres without flinching. **Performance**: this is where the **[On LightSpray Cloudboom Strike 2](https://www.on.com/fr-fr/products/cloudboom-strike-2-ls-u-3ug3002/unisex/white-verdite-shoes-3UG30025363)** hits hard. The responsiveness and energy return are immediate, almost mind-blowing. The concrete result: less effort needed to hold a given pace, so a lower heart rate at the same speed than with a regular shoe, with a difference you can feel even against other super shoes on the market. Add a featherweight build (158 g), and it's easy to see why this shoe is now considered the most accomplished in On's pure performance range. The numbers speak for it too: a 1.6% gain in running economy measured by the University of Cape Town, and a list of personal bests that makes your head spin. Hellen Obiri improved her best by 1 minute 48 in London, and Joe Klecker smashed his in Boston, taking 4 minutes 41 off the clock. And the example that will probably stick with us the most: [Yeman Crippa](https://www.instagram.com/p/DXCkQA0DNzS/?img_index=4), who blasted through the final kilometres of the Paris Marathon with this shoe on his feet, gaining 48 seconds on his time. Proof on the road of a muscular economy that holds right to the end, exactly what the new CloudTec® Sphere geometry is supposed to deliver. The only real caveat: like most super shoes, it is built exclusively for the road and isn't a fan of changes of direction. That said, this seems a little less pronounced than on other shoes of its kind. **Summary**: what we loved about the **On LightSpray Cloudboom Strike 2**: the unexpected comfort for a racing shoe, the durability of the LightSpray tech, responsiveness and energy return you feel straight away, remarkable lightness, a wild and futuristic design, and attention to detail right down to the unboxing (socks included, user guide). A shoe clearly designed with a single goal in mind: pure performance over the marathon or long-distance races, for runners looking to hold their speed to the very end rather than just max it out over the first few kilometres. **Specs: [On LightSpray Cloudboom Strike 2](https://www.on.com/fr-fr/products/cloudboom-strike-2-ls-u-3ug3002/unisex/white-verdite-shoes-3UG30025363)** - Weight: 158 g - Sizes: EU 36-49 - Drop: 5 mm - Price: €320 (pair of Elite Run Sock High Hyper included) - Technology: LightSpray™ upper, CloudTec® Sphere geometry, Helion™ HF foam, curved carbon Speedboard® - Availability: on.com and selected partner stores *As with most of our tests, the product was provided by the brand for the purpose of the review.* ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/d806e69174256e5176105b86540050ac136c1cf0-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/818bec1bdf6087947672202ddcbe2fdefd4a81d4-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/7d9f819aa9f4bf472470ccdea361aaef88c25b1a-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/5c637a6687f1244612bec4b35e7d8a4729ac805a-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/73acc3adf38c74a06baca110dc9db5c5fa7d2b00-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/d341919621d77bc2ab6c16bd4708248dbbe5e61c-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/9309d16810ce8f5af2f2379c950ac9badbd62164-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/6f52be0bf03e23c8ee30b8cd12d7a4768da7b37f-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/60b83a09247088469d3be4513e82f68cca548f7d-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/2e277a4ea3f554d562d933f7e789a8a8c83d8727-1500x1999.jpg?w=1600) ![](https://joliefoulee.fr/media-proxy/images/2aurc9wy/production/0025b73ebf79e63d78df0cf6acbee3411a7e85fc-1501x2000.jpg?w=1600)