On
Sizes are the brand’s own labels, mostly Italian (IT). See size guide for UK, US & EU conversions.
The On 'Cloudmonster 1' sneaker redefines the codes of technical footwear through a bold and performing aesthetic. Made with a structured technical fabric upper, this total black shoe is dominated by the iconic contrasting side logo and discreet reflective details on the heel. The design is distinguished by the imposing sculptural sole equipped with CloudTec® technology, characterized by empty macro-elements that guarantee superior cushioning. The mottled laces and the detail of the Swiss flag complete the silhouette with engineering precision. A masterpiece of innovation that transforms every step into an experience of pure urban dynamism. - Technical mesh upper - Chunky sole with CloudTec® cushioning system - Contrast side logo on - Reflective details on the heel - Speedboard® snappy - Helion foam" that absorbs impacts
| EU | UK | US | Foot length |
|---|---|---|---|
| 35 | 2.5 | 5 | 22.5 |
| 36 | 3.5 | 6 | 23.0 |
| 37 | 4 | 6.5 | 23.5 |
| 38 | 5 | 7.5 | 24.0 |
| 39 | 6 | 8.5 | 24.5 |
| 40 | 6.5 | 9 | 25.0 |
| 41 | 7.5 | 10 | 25.5 |
| 42 | 8 | 10.5 | 26.0 |
The size shown is the manufacturer's own label. The table below is general guidance for converting between systems, not measurements of this garment — brands vary, and the same number means a different size on Italian and Spanish labels. The reliable comparison is the waist in cm against something you already own that fits. See full size guide →
