Find Your Store
Home Page

Cart, contains 0 items

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
Expert Help
Earn Rewards

Ultimate Direction
Fastpack 15L Backpack

4 out of 5 stars
1 Review

Out of Stock

Don't worry though, we have a lot more Hydration Packs in stock than that.

Shop Similar Products

Fastpack 15L Backpack

After spending a long weekend conquering a thru-hike you've had on your list for a few years now, you're spent. Your massive pack helped you lug all of the gear you needed comfortably while you were out in the backcountry, but that doesn't mean you want to see it, much less put it on again, for a little while. Put your pack in the closet, and rest your own feet for a few days. When the weekend rolls around and you start feeling antsy again, reach for the Ultimate Direction Fastpack 15 Hydration Pack, and get back out on the trails in unencumbered comfort.

While you spend a leisurely day taking your time on a familiar old trail to an alpine lake, the Fastpack 15 will make sure you stay fed and hydrated, without being reminded of your aluminum-frame backpack of the weekend prior. Made with ultralight mesh and durable nylon, the Fastpack demonstrates Ultimate Direction's mastery at lightweight, breathable packs. The Fastpack's straightforward front-loading design and adjustable sternum strap promise to keep your snacks, camera, and hydration reservoir secured comfortably, without slowing you down on day hikes and summit pushes.


  • Head out for a speedy day hike with this ultralight pack
  • Large front pocket compatible with hydration bladder
  • Generous 21L capacity holds enough for an all-day adventure
  • Durable fabrics blend breathability with on-trail toughness
  • Sternum straps slide to deliver a customized fit
  • No-bounce laptop pocket secures electronics with cord
  • Item #ULD001Z
MonoRip Mesh, 100D Robic Triple-Ripstop, Power Span Stretch Mesh
21L (1281cu in)
sternum straps
Shoulder Straps
Hydration Compatible
front panel
front main, laptop
18.5 x 10.2 x 7.5in
Claimed Weight
1lb 1.5oz
hiking, trail running
Manufacturer Warranty

Overall Rating

4 based on 1 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 1 reviews
5 Stars - 0 reviews

Fits True To Size

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.
Runs smallTrue to sizeRuns large

What do you think about this product?


Selecting an option will reload the available reviews on the page
4 out of 5 stars

October 26, 2020

Amazing design, not for smaller ladies

I've used it once or twice and have initial impressions
Size Bought:
5' 6"

I bought this bag with the intent to use it adventure racing. I love the design of this bag. It has fantastic storage pockets, is very adjustable, is well thought out and looks great! I am a small-framed woman and was hoping that I could get away with the S/M men's bag, but unfortunately that is not the case. I couldn't cinch the chest straps down enough to be truly snug (close! I really tried!) and I definitely couldn't do that with my reservoir magnetic piece on the strap. Plus, the straps were just a little too long and extended past my rib cage and onto my abdomen - I only really noticed this after about 4 miles of hiking, but I wasn't going to stop noticing once it started. This might work for someone who is a little wider framed or who has more up top than I do (I'm a 32A...) to fill out the straps. I so, so wanted this to be my bag but I'm going to return it and get the FastpackHER instead.