This is LightSpray™
Revolutionary technology. Lighter than humanly possible.
Yes, the future of running is here.
LightSpray™ is revolutionizing performance running. By uniting robotics and material innovation, this unique technology cuts a multi-part process into a three-minute, minimal-waste step. The result? Our lightest racing shoe yet. The Cloudboom Strike LS weighs just 170g. No laces. No tongue. Only the essentials for speed and propulsion. Discover the Cloudboom Strike LS
The shoe drops July 3 in select stores – but be quick. Limited availability.
See stores below.
On Flagship Store Paris Champs-Élysées Mon - Sat: 10am - 9pm Sun: 10am - 8.30pm 65-67 Av. des Champs-Élysées, 75008 Paris, France On Flagship Store Milan Vittorio Emanuele Monday to Sunday: 10:00am - 8:00pm Corso Vittorio Emanuele II, 24/28, 20122 Milano MI, Italy On Flagship Store London Regent Street Monday to Saturday: 10am - 8pm Sunday: 12pm - 6pm 169 Regent St., London, W1B 4JP, UK On Flagship Store Zurich On Labs Monday to Friday: 10am - 6pm Saturday: 11am - 5pm Sunday: Closed Hardturmstrasse 183, CH-8005, Zürich, Switzerland
On Flagship Store NYC Flatiron Monday to Saturday: 10am - 8pm Sunday: 11am - 7pm 162 5th Ave, New York, NY 10010, USA On Flagship Store Chicago Rush Street Monday to Saturday: 10am-8pm Sunday: 10am-7pm 1043 N Rush St, Chicago, IL 60611, USA
On Flagship Store Tokyo Cat Street Monday to Sunday: 11am - 6.30pm 5 Chome-17-27 Jingumae, Shibuya City, Tokyo 150-0001, Japan
Want to see LightSpray™ live?
Join us at On Labs Zurich – the home of On and birthplace of our revolutionary LightSpray™ technology – an innovation, engineered in Switzerland. Experience our industry-changing innovation and own the Cloudboom Strike LS. Got three minutes? Watch a robot spray our lightest upper live at the world’s first LightSpray™ Factory. Then, hop on a treadmill and feel the future. On Labs Zurich will be open from July 3–6 at Förrlibuckstrasse 190. Want to join? Sign up below. If you can’t make it, we’ll also be in Tokyo and Berlin later on this year. Hope to see you there. Visit On Labs Zurich
Behind the tech
How LightSpray™ is changing the game
Yes, this robot sprays an upper. In just three minutes.
For decades, the sportswear industry has relied on a multi-step process to create shoes for athletes and fans. But LightSpray™ changes the game. Designed for elite-level running, our robot fuses 1.5km of filament onto a high-performance racing midsole. It forms a complete shoe upper in a single, three-minute step. No glues or seams means a 75% reduction in CO₂ emissions*, compared with our other racing uppers. You’ve never seen shoes made like this before.
With LightSpray™, we created our lightest upper yet. Weighing in at just 30g, it marks a new chapter for performance running. No laces mean fewer distractions. And the second-skin fit reduces chafing, so you can focus on the miles ahead – whether it’s 26.2 or more. By pairing this revolutionary upper with a propulsive bottom unit, we created the Cloudboom Strike LS. Featuring a carbon-fiber Speedboard® between two layers of Helion™ HF hyper foam for high energy return and impact absorption. Seen on podiums in Boston, Paris, New York, and Tokyo, it’s making strides around the world.
How it works
Removing excess steps and textiles, LightSpray™ transforms raw materials into something extraordinary.
LightSpray™ technology allows for glueless bonding and involves more than seven pending patents.
We cut out all unnecessary excess and processes. Like yarn and textile formation, conventional coloration, or increased water consumption.
The result? Less waste, fewer parts…
To make our fastest, lightest shoe.
History, made.
Our latest wins in LightSpray™
Yes, in 2024 it broke Heartbreak Hill.
Athletes around the world are putting the Cloudboom Strike LS through its paces. And the results speak for themselves. When Hellen Obiri first slipped into LightSpray™ in 2024, she won Boston – arguably one of the most prestigious 26.2 miles in the world. Then she followed up with podiums in Paris and New York. Three big finishes, in just one year.
Since then, more athletes have made strides in LightSpray™. Long-distance triathlete Kristian Blummenfelt claimed the European title, while Samuel Fitwi broke the German marathon record in Valencia, running 2:04:56. Dominic Lobalu clocked 26:54 in the Valencia 10K, breaking the Swiss record in the Cloudboom Strike LS. And Sutume Asefa Kebede won Tokyo 2025, defending her title with a time of 2:16:31. We’re so proud of our athletes, and this is just the beginning …
When you trust the shoes, you have that mentality ... I’m going to run fast.
After wearing them in my training runs, I found that the shoe provided not only great performance in the hardest workouts but also perfect support and stability.
The technology makes it really unique and impressive. All runners are interested and intrigued by this shoe. You’re bound to want to try it out to test your abilities.
Running in the Cloudboom Strike LS feels amazing. The shoe is super comfortable and bouncy. It’s so fast.
This is LightSpray™
