UltrAspire Big Bronco Vest

The 12-liter capacity is designed for ultra-distance runs, offering enough room for essential layers, a rain shell, nutrition, and safety gear. With seven pockets, you can organize smaller items like gels and keys separately from your bulkier clothing or emergency supplies.

The Big Bronco uses a lightweight, breathable mesh that conforms to your body shape to minimize movement. When adjusted properly using the Max O2 Form closure system, the vest is designed to remain stable against your torso, even when carrying a full load.

Yes, the vest is compatible with a 2-liter hydration reservoir. It also features a specialized holster system that allows you to carry up to four bottles if you prefer a mix of hydration options.

The Max O2 Form system is elasticized, which allows the vest to expand and contract with your rib cage as you breathe. This prevents the restrictive feeling often found in traditional, static-strap hydration vests during heavy exertion.

While built for the demands of ultra-running, the vest is versatile enough for shorter efforts if you need to carry extra gear or hydration. However, if you are running light and don't need the 12-liter capacity, you might find a smaller, more minimalist vest less cumbersome.