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  • Ultimate Direction - Fastpack 20 Backpack - 915-1403cu in - Spruce

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  • Ultimate Direction - Fastpack 20 Backpack - 915-1403cu in - Spruce

Ultimate Direction Fastpack 20 Backpack - 915-1403cu in

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    • Spruce

    8 Reviews


    One direction.

    Designed for everything from peak bagging to endurance running, the Ultimate Direction Fastpack 20 Backpack gives you what you need to get it done without weighing you down with extra doodads. Two stretchy pockets on the shoulder straps and two more on the sides of the pack hold water bottles, while z-style compression straps cinch down your load, and the removable foam back panel offers lightweight support. Ultimate Direction also gave the Fastpack dual sternum straps to keep it from bouncing around and trekking pole/ice axe loops in case things get really long or a little bit technical.

    • InfiKnit seamless back panel and shoulder straps
    • Removable foam back panel
    • Roll-top compartment
    • Stretch mesh back pocket
    • Strap water bottle pockets
    • Trekking pole and ice axe loops
    • Z-style compression straps
    • Dual sternum straps
    • Item #ULD000T

    Tech Specs

    Mono Hex mesh, Cool Wick Air mesh, 210T nylon ripstop
    915 - 1403 cu in
    removable foam back panel
    Shoulder Straps
    2 water bottle
    Trekking Pole Carry
    [S/M] 20 x 11.75 x 9.5 in, [M/L] 20 x 11 x 10 in
    Claimed Weight
    [S/M] 1 lb 3 oz, [M/L] 1 lb 4 oz
    Recommended Use
    hiking, running
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Another Great Pack From UD

    • Familiarity: I've used it several times

    Email me with all your UD or Ultra Running questions -

    I've already put up a review, though this is what my roomie has to say after using it

    I haven’t used this pack yet for it’s intended purpose of fast packing, but I have used it a number of times on long day hikes/runs when I want more gear (camera, puffy, etc…) than I can carry in my PB 3.0 vest, and it has worked very well. Even when fully loaded, the pack rides fairly snuggly with only minimal bouncing. When not fully loaded, the compression straps on the side also do a good job of keeping your gear from bouncing too much. At 6’ 170 lb, the S/M works surprisingly well, though I suspect I could have also gotten away with the M/L.

    My only complaints are:

    1) I wish the front pockets more closely mimicked those on my PB vest, as i find myself taking off the pack to grab food (or smaller gear items) more often than I usually would.

    2) The material, particularly on the interior of the main compartment, seems to be wearing out faster than it should.

    Great Gear Bag

    • Familiarity: I've used it several times

    If you're like me, you want to use your 20L packs for everything. From traveling, to running, to carting your gear from the pool. This pack is perfect for all of that. The stretch outer mesh is great for holding a wet towel or tossing in a wet rain jacket. The roll top is great to take this from a 20L pack to a 10-15L pack without looking like a noob. Almost everything about this pack is great, but there is one feature that has sold me on this guy. There is a small side pocket with just enough space to throw your cell phone, wallet, work key card, really anything you put in your pocket. This is my everyday gear bag, the more I use it, the more I fall in love with it.

    Great Gear Bag

    Perfect all around pack.

      I have only had this pack for about a month now. So far I have used it as a every day commuter pack, climbing gym pack, and carry on. It has served these purposes perfectly!

      As the weather gets nicer in the Colorado High country I plan on using this pack for long day trips as I train for my first 100 mile race.

      I will update this review in a couple months after I have beat this pack up on Colorado 14ers.

      Almost a year out...

      • Familiarity: I've put it through the wringer

      I really enjoy this pack. I'm a medium sized woman and it fits me really nicely in the S/M size. I like how snugly it fits to the body, which is great for mountain scrambles and the pockets mean I have to stop and take the pack off less often since I can keep my camera, GPS, gloves, hat, and a snack within reach. It holds a 3liter platypus so I can have plenty of water. The daisy chains are low-profile but allow me to put a larger item on the outside of the pack. I'm cautious about my spikes/crampons/snowshoes with this bag because I think they could easily make holes in the mesh. I mostly hike/scramble with this pack and have used it frequently in conditions from summer heat, heavy rain and snow. I haven't tried to run with it since I mostly do shorter trail runs without a pack. One thing that I've been disappointed by is its weather resistance.... meaning that it isn't. I have to use waterproof stuff sacks inside it or I have a sopping wet jacket in short order if it's even drizzling outside. That's the one thing I'd change--- it's set up with a rolltop like a waterproof bag could be, but the fabric soaks up water :/

      Great Pack

      • Familiarity: I've put it through the wringer

      Very versatile and light weight. I use it for fast packing (and some running) and it holds up well. Has enough room for some essentials (food, clothing, etc.) and has plenty of space for water. You can remove the back panel too which is nice for additional weight savings.

      What every backpack should feel like

      • Familiarity: I've put it through the wringer

      As a hiker turned runner, I find myself often caught between my old world of comparatively bulky preparedness and this new, lightweight, fast one in running. I was pointed to this by a salesperson at a local shop after trying on some other lightweight packs. After a few massive days and some smaller ones, I'm totally in love.

      The fastpack rides better than any true backpack, and the full mesh back/straps with no seams (genius) makes chafing nearly physically impossible. The compression straps work both laterally and vertically. Both side pockets are easy to reach while wearing the pack, and speaking of pockets, the giant stuff-it one on the very back is perfect for things like bars, sunglasses, lip balm, and all the things you want to get to quickly (there's more of these than I usually want to admit).

      There's the volume for layers, food, and those last few things I can't seem to shed in trying to be prepared for a mountain emergency. Pockets up front offer perfect hydration and bear spray access--I'm a convert to the front pockets program. So easy, so simple, and so comfy.

      The fabric is seems decently waterproof, and kept things pretty dry. You could even seam seal the interior if you wanted to go further.

      Ice axe compatibility is super nice.

      The back panel is removable if you want to go even lighter.

      Just a note: unlike the SJ/AK/PB vests, the right front pocket has a zippered baffle so you can change the volume, but no drawstring up top. Not much of an issue, just know that they're thinking more cell phone/water bottle compatibility there than the normal cinch string up top.

      A few hours to a few days

      • Familiarity: I've put it through the wringer

      I tested out the UD Fastpack 20 on a 60k ultra marathon last weekend in the Idaho wilderness. I decided to go for this larger (20L pack) compared to the smaller ones because it's still insanely light and I want to have the option to carry more without having excessive gear. The fit is just like the smaller racing vests but you can put a lot more of your in the pack if needed. The bottle holders up front are nice and snug, and I finished the race with no chafing whatsoever. I'll be posting an update once I take this pack on an overnighter in the Uintas later this summer. Stay tuned!

      A few hours to a few days


      • Familiarity: I've put it through the wringer

      The Killer Feature of the Fastpack 20 (and 30, really), is the rolltop, + compression staps, which turn the voluminous pack into basically a much, much smaller version of itself. That means there's no jostling of the contents inside, if you don't have much in there.

      The other Killer Feature is that these things expand a bit more than what they're rated for.

      This Versatility is why I use mine for commuting, going to the climbing gym, going to crag, going on mini bike adventures, and going on winter hikes/runs in the back country.


      Testing in Zion

      Buzz and Jared went off-trail in Zion to test the Fastpack: rough sandstone, steep cliffs, lots of sharp plants, and yeah, some water too. Read about it here...

      Testing in Zion