Ultra Vest Pro Fog

From On

On Vest Pro - Elite trail running vest for serious distance

On's premium trail running vest delivers professional-grade performance with integrated hydration and versatile storage. Featuring two 500ml Hydrapak® flasks and a detachable 10-litre dry pack, this athlete-tested vest handles everything from fast training runs to ultra-distance races.

An innovative closure system locks the vest securely against your body, eliminating movement even on technical terrain. Improved bottle and pocket positioning distributes weight strategically, maintaining balance as you drain flasks or access nutrition. At 300g, it's light enough to forget you're wearing it, yet robust enough for demanding conditions with reinforced construction in high-strain areas.

A front zip pocket provides quick phone access without breaking stride, whilst a rear zip pocket securely stores essentials away from your back. Large side pockets accommodate gels, bars, and layers within easy reach. The removable seam-taped dry pack with water-resistant zipper keeps spare kit or mandatory race gear protected, and additional daisy loops allow modular attachment for accessories like On's Ultra Quiver.

Manufacturer's description, supplied via the retailer feed.