Our most technical running pack, the Ultra™ 10 was designed to endure one of the toughest trail races on earth: the Ultra Trail du Mont Blanc. We engineered this pack to carry every item on the UTMB gear list: a 2 liter reservoir, room for food and extra layers, a sweat-proof pocket for your smartphone and two chest pockets for additional water bottles. If it works on Mont Blanc, it can handle just about anything. Refilling on the run? We’ve added color-coded straps so you’ll instantly know how to access your water supply, and an external-fill design that lets you refill without unpacking the bag. On hot days, fill the reservoir with ice water—the mesh back panel lets it sit against your back to cool your core.
We’ve also included overflow storage, trekking pole attachments and plenty of lash points, just in case you want to bring something we didn’t think of. The custom-fit harness and dual sternum straps adjust for a close, comfortable fit, and the cargo compression lets you cinch everything down to minimize bulk.
The Ultra 10 was designed to endure one of the toughest trail races on earth: the Ultra Trail du Mont Blanc. This year, our most rugged vest gets an upgrade with even lighter materials and a 2-liter reservoir that delivers more water with every sip. This pack is designed for self-supported runs that take competitors through mountainous terrain and unpredictable weather. It’s engineered to hold everything on the UTMB packing list, including food, shed layers, a headlamp, trekking poles, maps and more. The custom-fit harness and dual sternum straps adjust for a stable, comfortable fit, and the cargo compression lets you cinch everything down to minimize bulk.
The brand new Crux delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaks.
3D Ventilated mesh offers multi-directional air flow and cushioning to maximize comfort and breathability
Secure phone pocket conveniently located for quick access and includes a zipper closure for added security
Dual adjustable sternum straps increases stability and offer a range of adjustments for customization
Stretch overflow pocket offers easy access to toss in a rian shell or stash extra gear
Harness storage for all your run essentials offers organization for fuel and gear, including specially designed Quick Stow flask pockets
Reflectivity on front and back for early morning or evening runs
HYDRATION CAPACITY: 2L
HYDRATION TYPE: CRUX™ Reservoir with Quicklink™ System
BPA/BPS/BPF FREE: Yes
QUICK LINK DISCONNECT: Yes
GEAR CAPACITY: 8L
PACK WEIGHT: 280 g
DIMENSIONS: 40 x 29.5 x 21 cm
BACK PANEL: Ventilated 3D Mesh
WAIST BELT: N/A
NUMBER OF EXTERIOR POCKETS: 13
For hands-free hydration, our lightest hydration belt stores a 17-oz Quick Stow flask with soft walls that mold to the shape of your body. The 3D mesh material stays light and breathable on even the hottest runs, and the extra stretch pocket keeps gels, keys and cards safely tucked away. Plus, you won’t be stuck carrying a big empty bottle at the end of your run—once the flask is empty, just fold it up and tuck it away.
The convenience of external fill in a sleek bike pack. The 2.5L Crux™ reservoir can be refilled on the fly via the quick-release flap on the front of the pack. Two external pockets for small items like keys, wallet, phone or storage for a shed layer. We’ve also added reflective accents to keep you visible on early…