Ultra Vest Pro

The Ultra Vest Pro is On's race-tuned hydration vest — an improved fit over the original Ultra Vest, built for ultra-distance with two 500 ml HydraPak soft flasks, a removable dry pack, and extensive front and back pocket storage. Sewn-in pads on the shoulder straps prevent rib pressure from the flask caps, a detail reviewers specifically call out. Positioned against the CamelBak Ultra Pro and Ultimate Direction Ultra Vest 6.0. Ultra Vest Pro, race-tuned hydration vest. Two 500 ml HydraPak soft flasks included, removable dry pack, sewn-in shoulder-strap pads that eliminate rib pressure from flask caps.

Ultra Vest Pro is the race-tuned hydration piece in On's trail kit, the vest you'd pair with Cloudultra or Cloudvista for ultras, long mountain training days and self-supported adventures where carried water, fuel and a shell layer aren't optional.