Once you start running trails for more than an hour, a handheld water bottle stops being enough. You need both hands free for technical terrain, your water needs to be accessible without stopping, and you probably want to carry a few extras — fuel, a jacket, your phone. That's where hydration vests come in. After running in all of them across mountains in Colorado, Washington, and Oregon, here's what we recommend.
What Makes a Good Running Vest?
The best vests fit so well you forget you're wearing them. Look for: a snug fit that doesn't bounce, easy-access front pockets for gels and a phone, soft-flask compatibility, and enough storage for the conditions you're running in. Weight matters — every ounce you carry costs you over a long run.
Best Overall: Salomon Active Skin 8
The Salomon Active Skin 8 is the vest we reach for most often. It carries 8 liters of gear, fits like a second skin (meaning: virtually zero bounce), and has a well-designed front pocket system for easy mid-run access. It comes with two 500ml soft flasks that are among the best on the market.
Price: ~$130 | Best for: Half to full marathon distances, mountain runs, races
→ Check price on Amazon
Best for Ultramarathons: Nathan VaporAiress 2.0
For longer efforts where you need to carry more food, layers, and safety gear, the Nathan VaporAiress is our pick. It has thoughtful organization for long days out, a large main compartment, and a women's-specific fit that's genuinely different from the men's version (not just a re-label). The 2L bladder is included.
Price: ~$145 | Best for: Ultras, long mountain days, runners who carry a lot
→ Check price on Amazon
Best Budget Pick: CamelBak Zephyr Flex Vest
If you're new to trail running or don't want to spend over $100, the CamelBak Zephyr Flex is a solid entry point. It's not as refined as the Salomon, but the fit is good, the 1.5L capacity works well for shorter runs, and CamelBak's hydration systems are proven reliable.
Price: ~$80 | Best for: Beginners, shorter runs (under 10 miles), runners on a budget
→ Check price on Amazon
Best Minimalist Option: Naked Running Band
Not a vest at all — the Naked Running Band is a wide elastic waistband with expandable pockets that carry soft flasks, gels, and a phone. If you hate vests but need to carry more than a handheld allows, this is a revelation. Genuinely feels like nothing once you're running.
Price: ~$65 | Best for: Runners who hate vests, shorter distances, hot weather
→ Check price on Amazon
Tips for Getting the Right Fit
- Try on with the flasks or bladder filled — an empty vest fits differently
- Adjust all straps with your arms in running position, not standing still
- If the vest bounces at all when you jump, it doesn't fit right — keep adjusting
- Women's-specific vests are worth it for female runners — generic vests chafe in different places
Our Pick
For most trail runners, the Salomon Active Skin 8 is the right answer. It's not cheap, but it's the vest you'll still be using in five years. If budget is tight, start with the CamelBak Zephyr and upgrade when you know what you want.
Note: We use affiliate links. If you buy through them, we earn a small commission at no cost to you. Full disclosure.