First Impressions – A True Challenger to Ultimate Direction
If you’ve followed me for any length of time, you’ll know I’ve been a die-hard Ultimate Direction fastpack user for nearly a decade. From the Fastpack 25 to the Fastpack 35, their vest-style packs have been my go-to for big mountain days and ultralight multi-day missions.
But here’s the bombshell: Gossamer Gear’s Fast Kumo has converted me. This pack outperforms UD offerings on so many fronts it’s hard to ignore.
(Disclosure: This product was supplied by Gossamer Gear. As always, my opinions are entirely my own. I may receive a commission if you purchase through links on this page, at no additional cost to you.)
Watch My Full YouTube Review Here
Weight and Storage Comparison
Here’s how the Fast Kumo stacks up against my previous fastpacks:
| Pack | Weight | Capacity | Pockets |
|---|---|---|---|
| Gossamer Gear Fast Kumo | 20.3 oz (575g) | 36L | SO MANY – waist, bottle, snacks, phone, mesh sides |
| Ultimate Direction Fastpack 25 | 22 oz (623g) | 25L | Fewer pockets overall |
| Ultimate Direction Fastpack 35 | 26 oz (737g) | 35L | Fewer pockets, slightly heavier |
| Outdoor Vitals Shadowlight | 27 oz (765g) | 60L | Minimal fastpack-style pockets |
| Ortlieb Soulo | ~39 oz (1100g) | 25L | Waterproof but heavy |
| Ortlieb Atrack | ~47 oz (1330g) | 25L | Fully waterproof but lacks front/waist pockets |
At 20.3 oz with 36L capacity, the Fast Kumo is lighter than both UD packs while providing more storage space and dramatically more pockets.
Ergonomics and Comfort
What really sold me was how well the Fast Kumo carries weight. It fits like a vest but with the structure of a traditional frameless ultralight pack. Even with 8-10kg, it stays snug with no bounce, perfect for fast hiking and technical trail descents.
Waterproofness – A Major Win
Unlike UD packs, the Fast Kumo’s roll-top opening and waterproof fabric keep rain out far better. While not a full drybag like the Ortlieb Atrack, it offers superior weather resistance compared to any running vest-style pack I’ve used.
The Pockets – SO Many Pockets
This is where the Fast Kumo blows Ultimate Direction out of the water. The pack features:
- Dual waist belt pockets
- Dual large mesh side pockets for bottles or tent poles
- Large stretchy front mesh pocket
- Top quick access pocket
- Shoulder strap pockets for phone, GPS, snacks
In total, it provides more organisation options than any fastpack I’ve ever reviewed.
Final Thoughts – Is It Worth It?
✅ YES. The Fast Kumo is the first fastpack in nearly a decade to dethrone Ultimate Direction for me. It combines ultralight design with thoughtful ergonomics, weather resistance, and best-in-class storage options.
If you’re an ultralight hiker, trail runner, or multi-day fastpacker looking for a pack that carries comfortably while letting you access everything on the move, this is it.
Ready to Upgrade Your Fastpack?
Check out the full details and price here
Features & Specs
- Weight: 20.3 oz (575g)
- Capacity: 36L
- Material: Robic nylon with PU coating
- Closure: Roll-top with buckle
- Pockets: Dual waist belt, dual side mesh, front mesh, top pocket, shoulder strap pockets
- Recommended Load: Up to ~10kg (22lb)
About Gossamer Gear
Founded by Glen Van Peski, Gossamer Gear is a pioneer in ultralight backpacking gear, designing products that strip away unnecessary weight without sacrificing comfort or function. From innovative trekking poles to minimalist packs, they remain a favourite among thru-hikers and ultralight purists worldwide.
What do you carry on your fastpack trips – do you prefer vest-style or traditional ultralight packs? Drop your thoughts below.
