On Ultra Vest Pro

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Product Description

BUILT FOR ULTRA DISTANCE

The On Ultra Vest Pro represents the next generation of high-performance trail running hydration vests. Designed for demanding races, long trail missions and fast mountain days, it combines lightweight construction with intelligent storage and a stable, bounce-free fit.

With a 10-liter dry pack and two included 500 ml Hydrapak® flasks, the vest keeps hydration and gear easily accessible while on the move. Thoughtful pocket placement and a secure closure system help keep everything organised so you can focus on the trail ahead.

Engineered with durable recycled materials and athlete-tested performance design, the Ultra Vest Pro delivers reliable comfort and functionality when the distance gets long.

Optimized performance

Improved bottle and pocket positioning keeps hydration and essentials exactly where you need them. A front zip pocket provides easy phone access while a new rear zip pocket stores gear securely without bounce.

Athlete-validated design

Tested and refined by elite trail runners, the vest features an improved performance fit that reduces bouncing while increasing durability in high-strain zones for demanding terrain.

Packed with essentials

Includes two BPA-free Hydrapak® flasks and a removable seam-taped dry pack with a water-resistant zipper. Additional loops and attachment points provide modular storage while a safety whistle keeps you prepared.

Lightweight trail running hydration vest
Two 500 ml Hydrapak® soft flasks included
Innovative closure system designed for a stable, no-bounce fit
Large side pockets for quick access essentials
Removable seam-taped dry pack with water-resistant zipper
Front zip pocket for easy phone access
Back zip pocket for additional storage
Integrated safety whistle for emergency situations

Front: Polyester (recycled) 100%
Back Panel: Polyamide (recycled) 85%, Elastane 15%
Pocketing: Polyamide (recycled) 85%, Elastane 15%
Bag: Polyamide (recycled) 100%

Weight: 300 g
Storage Volume: 10 L dry pack
Hydration: Two 500 ml Hydrapak® flasks included
Use: Trail running, ultramarathons and endurance training