Lightweight, breathable Ultra 12.0 Vest with secure storage and ergonomic fit for long-distance runs
What Our Gearhead® Experts Are Saying:
"This vest is my go-to for ultra races and long trail runs. The ergonomic fit wraps securely around my torso, eliminating bounce, while the breathable mesh keeps me cool. I love the water-resistant pockets for my phone and essentials, and the included HydraPak bottles make staying hydrated effortless. Whether I'm running in the mountains or logging miles on the road, this vest keeps me moving comfortably."
We push our limits on the trail, and the Ultra 12.0 Vest keeps up with every step. Designed for long-distance comfort, this lightweight, breathable vest contours to our body with stretch mesh side panels, providing a secure, vest-like fit that eliminates bounce and irritation.
With hydration always within reach, this vest includes two HydraPak Body Bottle 500s secured with bungee loops, plus a reservoir sleeve for extra water storage. Water-resistant chest pockets keep essentials safe, while quick-access stretch stash pockets let us grab nutrition on the go. Whether we're tackling ultra distances or training on rugged terrain, this vest keeps us prepared for every mile ahead.
Details
- 12L capacity hydration vest designed for ultra-distance running
- Soft, breathable monomesh liner reduces chafing and enhances comfort
- Includes two HydraPak Body Bottle 500s with secure bungee loops
- Water-resistant chest pockets keep essentials dry and accessible
- Adjustable static sternum straps provide bounce-free stability
- Stretch back pass-through pocket fits extra layers and gear
- Item #ULDF040
- Responsible Collection
- Recycled/Repurposed
- Volume
- 12L (732.29cu in)
- Shoulder Straps
- vest-style
- Waist Belt
- 2 sternum straps
- Hydration Compatible
- yes
- Reservoir Included
- 2 500mL HydraPak Body Bottles
- Access
- zippered clamshell
- Pockets
- 2 zippered ripstop chest, 1 water-resistant, zippered main compartment, 1 zippered, water-resistant back, 1 stretch pass-through, 2 mesh shoulder stash
- Gear Loops
- 1 pass-through trekking pole
- Trekking Pole Carry
- 2
- Compression
- bungee
- Claimed Weight
- 7.92oz
- Activity
- trail running, hiking
- Manufacturer Warranty
- limited 1 year
Reviews
Q&A
What do you think about this product?
Overall Rating
3.5 based on 2 ratings
Review Summary
Fits Small
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageJune 28, 2025
Runs small, get correct size!
- Familiarity:
- I've used it several times
- Size Bought:
- large
- Height:
- 5' 6"
- Weight:
- 140
I have a 40" chest and am lean; by the UD sizing recommendations, that would be a medium. The medium was absurdly tight. The good folks at Backcountry took it back and sent me a size large, which I've since used and liked.
June 6, 2025
Be careful of the sizing
- Familiarity:
- I returned this product before using it
- Size Bought:
- medium
- Height:
- 5' 6"
- Weight:
- 140
I'm sending my "medium" back. I have a 40" chest, which falls in the suggested range for medium. With the straps extended fully, this thing is absurdly tight, cutting off the circulation in my arms. Here's hoping the "large" is at least medium.
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