Designed by Athletes, for Athletes

Meet the lightest shoe in the ON Cloudmonster family—engineered for max cushioning and explosive rebound with a dual-foam midsole that delivers next-level performance.

CloudTec® Meets Helion™ HF: Maximum Cushioning with a Kick

Extreme CloudTec® combines with Helion™ HF hyper foam for an ultra-responsive ride. The dual-foam midsole absorbs impact and provides plush cushioning, while Helion™ HF in the forefoot energises every stride with powerful rebound. It’s the same cutting-edge foam found in ON's top racing models, like the Cloudboom Echo 3.

Lighter, Faster, More Responsive

ON removed the Speedboard® to reduce weight and promote faster post-training recovery. Instead, Helion™ HF hyper foam acts as a natural bounce board, propelling you forward for maximum energy return, superior cushioning, and hyper performance.

Locked-In Fit, Seamless Comfort

Stay secure and supported with high-grip laces woven with silicone and reworked eyestays for a locked-in feel—even during explosive take-offs. A breathable microfibre upper, made from recycled polyester, moulds seamlessly around your foot for a customised, barely-there fit.

Technical Features

• Best for: Running, Marathon, Road Running
• Heet to Toe Drop: 6mm 
• Weight: 265g
• Max cushioning meets Helion™ HF for max energy return
• Forward-rolling, agile and fast
• Dual foam construction to maximise cushioning levels
• High-grip laces woven with silicone keeps you locked in
• Helion™ HF absorbs impact and gives maximum rebound
• A microfibre upper delivers breathability
• Developed with professional athletes