A running vest is the most personal piece of gear you'll buy. The wrong vest will end your race; the right one will disappear. We've worn each of these for at least one full ultra — most of them for several. None of these brands paid for placement; we get a small commission if you buy via the links below.
Below, the five vests we'd actually recommend in 2026, in order of overall pick. After the picks, a short note on how to size, when to choose 8L vs 12L, and the chafe-prevention tip nobody tells you.
The picks, ranked
Salomon
Salomon Adv Skin 12 Set
The vest most 100-mile finishers actually wear. Sensifit chassis, twin soft-flask front, no chafe at hour fourteen.
- 12L total capacity — cool weather + cold weather
- Twin 500ml soft-flask compatible (included)
- Custom Sensifit fit
- Pole-carry routing front and rear
UltrAspire
UltrAspire Zygos 5.0
Top-of-the-line storage for stage races and unsupported runs. The pocket layout is the most thought-through in the category.
- 13L+ capacity, expandable
- 12 functional pockets including dual gel pockets
- Magnetic chest pocket — gel-friendly
- Run-specific bounce-free fit
Black Diamond
Black Diamond Distance 8
Built for vert. Pole-carry system that actually works mid-stride; lightweight even loaded for a half-day push.
- 8L — short-to-medium ultras (50K to 100K)
- Excellent pole carry (front and back)
- Lighter than Salomon by 60g
- Zip stash pocket on chest
Nathan
Nathan Pinnacle 12L
Solid mid-tier choice. Soft chassis, flexible bottle pockets, plenty of organization. A great one to pick if Salomon Sensifit doesn't fit your shoulders.
- 12L all-day capacity
- Three-bottle compatible (chest + back)
- Trekking-pole loops
- Better fit for narrower shoulders
Osprey
Osprey Duro 6
A real ultra vest at a sub-$150 price. 6L is enough for 50K and most 50-milers; comes with a 1.5L reservoir included.
- 6L capacity (good for 50K to 50M)
- Includes 1.5L reservoir + magnetic hose lock
- Stretch-mesh side pockets
- Lifetime "All Mighty" warranty
How to choose: capacity by race
- 50K and shorter, supported — 5–8L is fine. Osprey Duro 6 or BD Distance 8.
- 50 mile, supported — 8–12L. Salomon Adv Skin 12 or BD Distance 12.
- 100K, fully supported — 12L is the sweet spot. Salomon Adv Skin 12 or Nathan Pinnacle 12.
- 100 mile, supported — 12L is enough. Carry less than you think; aid stations are frequent.
- 100 mile, mountain / cold — 12–18L. Adv Skin 12 + a stuff sack of layers, or UltrAspire Zygos 5.0.
- 200+ miles or stage — UltrAspire Zygos 5.0, period. The pocket layout matters when you're packing for 70 hours.
Sizing — measure your chest, ignore the model size
Vests run small. Salomon's M is most people's L. Always pull from a chest measurement (just under the armpits, around the widest part of the chest), not your shirt size. If you're between sizes, go down — a vest needs to fit snug to not bounce. A loose vest will chafe at hour ten.
The chafe-prevention tip nobody tells you
Apply two thin layers of Body Glide on your sternum, both shoulder seams, and the small of your back, the night before a race. Re-apply at the first crew stop. The vest's chafe profile matters less than your skin's friction profile — the right combination of dry seams, an A-shirt under, and pre-applied Body Glide is what saves your race.
Frequently asked
Soft flasks vs reservoir?
Soft flasks for races; reservoirs for long training runs. In a race, you'll need to refill quickly at aid stations — soft flasks come out and back in 30 seconds. A reservoir takes 90 seconds to remove, fill, and re-seat. Multiplied by 12 aid stations, that's 12 minutes of avoidable downtime.
Is the Salomon worth $170 over the Osprey at $130?
For 50K and 50-milers, no. For 100K+ races where you'll wear the vest for 14–24 hours, yes. The Salomon's chassis distributes load better and has fewer chafe seams. By hour twelve, the difference is significant.
Where do I put my poles?
Front carry beats back carry. Front is faster to deploy, doesn't catch branches, and weights closer to your center of gravity. Both Salomon Adv Skin and Black Diamond Distance vests have proper front-pole routing. If you're a back-carrier, you'll re-learn within one race.