5 Best Running Vests for Ultra Marathons in 2025
Published 2025-04-01
A running vest is the most important piece of gear after your shoes. It carries your water, food, and required gear — and a bad one will ruin your race with bouncing, chafing, and hot spots.
How We Tested
We ran 2,000+ collective miles in 12 different vests across 50Ks, 100Ks, and 100-milers. We evaluated fit, bounce, storage, hydration access, and durability.
1. Salomon ADV Skin 5 — Best Overall
The ADV Skin 5 is the vest we recommend to most runners. It fits like a second skin, the soft flasks are easy to access, and the storage is smartly designed with stretch mesh pockets that hold nutrition without bouncing.
Capacity: 5L | Weight: 4.2oz (empty) | Price: $130
2. Nathan VaporAir 3.0 — Best for Hot Weather
The VaporAir uses an open mesh back panel that breathes better than any other vest we tested. If you run in heat, this is the one.
Capacity: 7L | Weight: 7.5oz | Price: $150
3. Ultimate Direction Ultra Vest 6.0 — Best Storage
More pockets than any other vest in this list. The UD Ultra Vest is ideal for 100-milers where you need to carry extra layers, a headlamp, and more food.
Capacity: 10.3L | Weight: 8.1oz | Price: $160
4. Osprey Duro 6 — Best Fit for Large Frames
Most running vests are designed for slim builds. The Duro uses a magnetic sternum strap and stretchy side panels that accommodate broader chests and torsos without compression.
Capacity: 6L | Weight: 9.0oz | Price: $140
5. Naked Running Vest — Most Minimal
Just two front pouches that stretch to hold flasks, phone, and nutrition. No back panel. If you hate wearing anything bulky, this is it.
Capacity: 2.5L | Weight: 2.1oz | Price: $80
How to Choose
- First ultra / 50K: Salomon ADV Skin 5
- Hot weather: Nathan VaporAir 3.0
- 100-miler: Ultimate Direction Ultra Vest 6.0
- Broad build: Osprey Duro 6
- Minimalist: Naked Running Vest
Products Mentioned in This Article
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Frequently Asked Questions
What size running vest do I need for a 50K?
5–7 liters is plenty for most 50Ks with aid stations every 4–6 miles. You'll carry 2 soft flasks, nutrition, phone, and a light layer.
Do I need a running vest or a handheld bottle?
For ultras, a vest is almost always better. It distributes weight evenly and frees your hands for scrambles and trekking poles.