LightSpray™
Find answers to your most commonly asked questions.
LightSpray™
LightSpray™ is a new high performance upper technology crafted by a revolutionary single-step manufacturing process. LightSpray™ ultralight uppers are sprayed, not built, in a fast one-step process, automated by a robotic arm at On Labs in Zurich. It reduces CO₂ emissions, paving the way for a circular future and faster, localized manufacturing.
Check out more information about the technology here.
The Cloudboom Strike LS is the first On shoe made with LightSpray™ technology. It features an ultra-thin LightSpray™ upper which is precision-sprayed for support, seamless and lace-free, resulting in an exceptionally lightweight shoe weighing just 170g. Check out the product here.
The making of a conventional running shoe upper usually consists of several process steps: raw material production, yarn creation, textile formation (e.g. weaving or knitting), preparation, coloration, additional finishing, cutting and then finally assembly through bonding and sewing. Every step involves energy consumption, logistics, and the creation of waste from materials and water. The unique LightSpray™ assembly process is a much more efficient process. It minimizes waste, eliminates the need for glues and produces 75% less CO₂ than our other premium uppers. It also vastly reduces the total number of parts, and means we can create LightSpray™ shoes wherever we have a robot lab – saving on transport miles too.
Yes, all the emissions data is based on a 3rd party LifeCycle Assessment (LCA) performed by Vaayu. You can find more information in the final report here.
The LightSpray™ upper in the Cloudboom Strike LS is not currently made with recycled materials. We will continue to explore ways to include recycled materials as the technology expands in the future.
In manufacturing anything, the thing that takes the most energy is when you need to generate heat. So, with LightSpray™ the most energy-hungry part of the process is the heat needed to melt the polymer. But we've cut out all the other processes that need heat in traditional manufacturing, which hugely cuts the overall energy consumption.
We're taking our robot to select cities around the world. Discover where you can experience LightSpray™ live at on.com/lightspray.
This is a real breakthrough in manufacturing. It's just the beginning – and the potential is huge. Watch this space!
The Cloudboom Strike LS, which features LightSpray™ technology, launched in 2024 in limited quantities. Now, it's back. We're dropping more shoes on September 4, 2025 in select stores. Be quick – there's a limited amount.
Discover where you can shop the Cloudboom Strike LS at on.com/lightspray, and sign up here to hear first about future drops.
More shoes drop on September 4 in select stores. Discover where you can buy the Cloudboom Strike LS at on.com/lightspray.
The Cloudboom Strike LS, featuring LightSpray™ technology, will be available again on September 4, in limited quantities. Discover where you can buy the Cloudboom Strike LS at on.com/lightspray or sign up here to learn more about our upcoming drops.
On members will be the first to know when LightSpray™ drops. You can become a member of the On communtiy for free here.
Sorry to hear about that. The Cloudboom Strike LS is only available in limited quantities. Sign up for updates at on.com/lightspray to be the first to know about our next drop.
At the moment, the Cloudboom Strike LS is not available online. But if you click on the sold-out size and enter your email address, you'll be alerted as soon as more pairs are available. If no stock updates are planned, you'll be prompted to sign up for the our newsletter to hear first about updates on future products and campaigns.
Unfortunatley not. Promo codes can't be used on limited-edition products, like LightSpray™ shoes.
It's easy to become a member by creating an On account. Click on “Login to shop” and then “Create account”, or click on the person icon in the top-right corner of any page on On.com.
The shoe's supportive structure means you can stretch the top slightly to put it on. The textile-like material wraps around your foot securely. Unlike other sock-like shoes that use stretchy, elastic knit textiles, LightSpray™ achieves its stretch through the unique looping of the yarn itself.
The robot can be programmed to control the thickness of the upper in specific areas, by adjusting the tightness and overlap of the filament loops. This technique allows for precise support in high-speed running scenarios. For example, around the heel, the fabric is thicker to keep the foot locked in, whereas on the instep, it's more stretchy and thinner.
We would recommend wearing a sock. There's no lining in a LightSpray™ shoe, you stand directly on the foam so you may want the additional comfort layer.