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Item # ULT1A204M

Ultimate Direction Fastpack 45

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Ultimate Direction Fastpack 45

By Becky

Enwild Gear Specialist

The Enwild Difference

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Designed for thru-hikers and hard-charging, ounce-counting adventurers, the Ultimate Direction Fastpack 45 offers the capacity and features for extended, fast-moving forays.


Designed for thru-hikers and hard-charging, ounce-counting adventurers, the Ultimate Direction Fastpack 45 offers the capacity and features for extended, fast-moving forays.

The pack is constructed of lightweight but durable 100D Robic Triple-Ripstop and Power Span Stretch mesh. Despite weighing just 26.43 ounces, the pack can effectively carry two full water bottles (not included), a full hydration bladder (sold separately), and a ton of backcountry essentials. Padded/ventilated strapping and edging throughout the pack body provide a comfortable fit and breathable performance. Ultimate Direction’s unique InfiKnit construction incorporates the shoulder straps and backpanel into a single, seamless piece that greatly cuts down on hot spots and maximizes comfort and fit by mirroring the contours of your body. Dual sternum straps with sliding adjustability help you to really dial in fit. A webbing waist belt further stabilizes the pack. The pack is available in Small/Medium (26"-44" chest measurement) and Medium/Large (30"-50") sizes. NOTE: When full of gear, the vest will fit smaller.

The pack offers 2856 cubic inch (46.8L) storage capacity. The main compartment has a roll-top closure that protects contents and enables the pack to cinch down to small when not filled to full capacity. Integrated side compression straps also help in load stabilization whether the pack is full or relatively empty. On the face of the pack is a large, elastic shove-it pocket that easily stows discarded layers and other essential gear. Large mesh side pockets are ideal for water bottles or other gear. On the chest portion of the harness there are multiple pockets, two of which are large enough to carry water bottles (not included). The pack also features numerous lash points, including dual low-profile daisy chain trekking pole attachments and ice axe loops.

  • Patented InfiKnit Harness is an entirely seamless back-panel and shoulder-strap system to prevent abrasion and discomfort
  • Roll-top closure expands or contracts to secure varying capacities
  • Large external stretch mesh pockets for quick access
  • Large front storage for water, phone, maps, glasses, or food
  • Lightweight mesh belt for stability
California residents: view proposition 65  Warning

Technical Specs

Best Use
Backpacking, Hiking, Running/Fitness
Top Loading
Item Dimensions
28.3" x 11" x 11"
Hydration Compatible
Sternum Strap
Yes; Adjustable
Torso Adjustment
2856 cu in
Limited Lifetime
Vest Pack
MonoRip Mesh, 100D Robic Triple-Ripstop and Power Span Stretch Mesh
Item Weight
26.43 oz

2 Reviews

4 / 5


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John D.


Almost great


- A high capacity running vest - Roll top closure - Harness access for snacks/water


- Velcro top closure goes across entire opening. Shags on sleeves when getting into pack EVERY. SINGLE. TIME. -Textile felt plastic - Buckles are a bizarre inside out squeeze buckle that only connects a certain way. Makes roll top closure difficult, because only even numbers of rolls can be buckled

Tara C.


Very comfy


I like the overall design of the pack. The roll top and single compartment are what made me look at this. The expandable pocket is perfect for stowing gear that is needed quickly. The large side pockets are big enough for gear or water bottles. The best thing is the double sternum straps and the pockets on the shoulder straps. You can fit snacks and a water bottle as well as a phone. I also like the waist strap. It sits at my waist. The pack does not dig into my butt cheeks like my osprey ag did. I like the clasp design too, no pinchy buckles. This pack is lightweight and doesn't have a ton of straps hanging all over the place. I like the daisy chain that allows you to attach gear but is streamlined when not in use.


i love this pack so far, the only thing that would have been nice is more color options.