Innovation meets speed. The On Cloudboom Strike LightSpray features groundbreaking robot-sprayed LightSpray™ technology – a seamless, laceless upper created from 1.5km of filament that delivers an ultralight second-skin fit whilst reducing CO2 emissions by 75%. Dual layers of Helion™ HF hyper foam provide exceptional energy return and propulsive bounce, making this one of the lightest super shoes on the market. Built for race day from 10K to marathon, worn by elite athletes including Hellen Obiri who won the 2024 Boston Marathon and 2025 New York City Marathon in the Cloudboom Strike LS.