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Ultimate Direction Fastpack 20 hiking daypack rear view

Ultimate Direction Fastpack 20 Daypack Review

Makenna Hall (gear tester)
ByMakenna Hall
May 09, 2025
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Our Take:
4.3/5
The Ultimate Direction Fastpack 20 ($150) is a niche but effective pack for fast-moving adventures. It blends the fit of a running vest with the capacity of a daypack, offering impressive comfort and stability for light loads on the move. The performance setup and snug fit are overkill and a little out of place for casual hikes, and it’s also not built for hauling more than about 15 pounds. But with smart on-the-go storage, it’s a good choice for those who like to cover ground quickly.
Comfort & Support

Comfort & Support

3.5/5
Organization

Organization

4/5
Weight

Weight

4/5
Durability

Durability

2/5
Water Resistance

Water Resistance

2/5
Sustainability

Sustainability

1.2/5

Weight

1 lb. 4.8 oz.

Capacity

20L (30, 40L)

Hipbelt

Webbing

Suspension

Frameless

Pros

Affordable and extremely versatile.
Stability and storage of a running vest-style chest harness paired with a hipbelt.
Smart organization throughout.

Cons

Not the most bounce-free model for trail running.
Relatively flimsy buckles.
Some pockets are hard to access.

The Ultimate Direction Fastpack 20 blends the fit of a running vest with the storage of a hiking daypack, delivering a snug, body-hugging feel ideal for fast-moving adventures. Its vest-style harness uses dual chest buckles for secure, bounce-free support, and the thin webbing hipbelt and flexible shoulder straps conform well without adding bulk. There’s not much padding, but I found that to be a benefit when moving fast—it keeps the pack light and close to the body without chafing.

I carried 15 to 20 pounds of gear on multiple outings, including food, water, and climbing equipment, and the pack handled the load surprisingly well. The soft foam backpanel was unobtrusive, even when the pack was fully loaded. However, the pack lacks a frame or stays, so comfort does start to break down with heavier setups. Overloading it causes the pack to sag and pull on the shoulders more than I’d like. For heavier hiking loads, a pack like the Osprey Talon Velocity offers better load support while still retaining a vest-inspired shape.

Ultimately, the Fastpack 20 is purpose-built for fastpacking, long-distance trail running, and hybrid hike/run outings. Its streamlined design and light carry make it perfect for covering big miles efficiently, but it’s less suited for slower-paced hikes with substantial gear. The ability to use it as both a travel bag and a performance pack adds to its versatility, especially for those planning multi-sport days or light overnight pushes.

Hiking down rock trail wearing the Ultimate Direction Fastpack 20 hiking daypack
Adjusting straps of Ultimate Direction Fastpack 20 hiking daypack

The UD Fastpack 20 strikes a solid balance between streamlined storage and trail-ready utility. Its main compartment is spacious enough for layers, food, and gear, with both top and side zip access for easy packing and retrieval. Inside, a small zippered pouch is ideal for valuables or toiletries. While it doesn’t include soft flasks, the vest-style harness features two cinch-style front pockets that work perfectly with standard soft bottles for on-the-go hydration with minimal bounce.

Additional storage includes dual side pockets that easily fit standard Nalgene bottles, a large external stretch pocket for quick-access layers like a rain shell, and several small front stash pockets for snacks, chapstick, or a phone—one of which zips shut for secure access. There’s also a hydration bladder sleeve in the main compartment, though I preferred using soft flasks up front.

In terms of layout, it’s a hybrid between a running vest and a traditional daypack—more technical than something like the Osprey Daylite, but with far more capacity than a standard running vest. It works especially well for fastpacking or mixed run/hike days where gear volume matters. My one gripe: a pair of front pockets feature internal dividers that seem well-intentioned but ended up too tight to be practical—I struggled to fit much more than a gel or two inside, and accessing items was awkward.

Roll-top closure of Ultimate Direction Fastpack 20 hiking daypack
Gear accessed through zip-down main compartment of Ultimate Direction Fastpack 20 hiking daypack

At 1 pound 4.8 ounces, the Fastpack 20 is impressively light for a pack with this much storage and functionality. It undercuts most traditional hiking daypacks—like the Gregory Miko or Osprey Talon—which typically land over 2 pounds. That weight savings makes a real difference on long days when speed and efficiency matter. For an even lighter alternative, the Black Diamond Distance 22 trims down to 14.9 ounces, but its focused, stripped-back design is best for mountain running and scrambling (for more, read our BD Distance 22 review). The Mystery Ranch Gallagator (1 lb. 6.4 oz.) comes close in weight but falls behind in both comfort and organization.

Despite its low weight, the Fastpack 20 is surprisingly versatile. It’s suitable for trail running, long hikes, travel, or even minimalist overnights. While it’s not the kind of pack you’d throw into a larger backpacking pack (even though you could remove the back pad), it’s clearly designed to be worn—not carried—and excels when used for its intended purpose: moving fast with functional gear capacity.

The Ultimate Direction Fastpack 20 is built with lightweight polyester fabric—there’s no listed denier, but the material feels thin and clearly prioritizes minimalism over ruggedness. This isn’t a pack meant for rough terrain or heavy abuse. That said, I owned an earlier version of this pack, and it held up well over years of consistent use. The main weak point in my experience was the plastic buckles—one broke after extended wear, though it was easy to replace.

Otherwise, the construction is fair for the weight. The zippers—often the first thing to fail on lightweight packs—performed reliably, even when exposed to dirt and trail grit. At $150, it’s a decent value for a niche product that, with proper care, should last several seasons of trail use. Still, this is not the pack to choose if you prioritize durability. Options like the Osprey Talon (100D nylon) or Stratos (210D nylon) offer far more robust builds, though they weigh significantly more and serve different purposes. The Fastpack is best seen as a specialized tool: light, capable, and efficient—but not indestructible.

Hiker resting with Ultimate Direction Fastpack 20 hiking daypack nearby

The Fastpack 20 doesn’t include a rain cover—a notable omission for a pack at this price point. The thin polyester fabric absorbs moisture quickly, and the vest-style harness material on the front soaks through just as easily. If you plan to use this pack in wet conditions, a separate rain cover is a smart (and likely necessary) investment. Something like REI’s Duck’s Back cover will run you around $25–$35. Without added protection, the pack can become saturated and heavy, and your gear may be at risk. For dry-weather use, it’s of course completely fine—but don’t count on built-in water resistance.

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Longevity

Choosing durable outdoor gear is perhaps the most effective way to reduce environmental impact—the longer it lasts, the less it needs to be produced. Our proprietary longevity rating evaluates overall build quality based on factors such as materials, fabric denier, component durability (including zippers and toggles), real-world performance as reported by our field testers, and our experiences with the brand.

The Ultimate Direction Fastpack 20 is offered in two sizes, with fit based on torso length and chest circumference. I went with the Small/Medium based on the size chart, and it fit true to size. The pack rides high and close to the body—an ideal setup for running, where stability and reduced bounce matter most. I found the fit comfortable and secure, with plenty of adjustability through the chest and hip straps to fine-tune as needed.

The webbing hipbelt sits below the dual chest buckles and can be removed or left unbuckled, depending on your preference. I found myself skipping it entirely on casual outings, which didn’t impact comfort or pack stability for lighter loads.

Hiking on red rock trail with Ultimate Direction Fastpack 20 hiking daypack

Black Diamond Distance 22 ($200): For Mountain-Minded Fastpackers
At a glance, the Distance 22 and Fastpack 20 look nearly identical—both pair a running vest-style harness with a streamlined backpack. If you want a daypack that moves with you and provides quick access to food and snacks, either is a solid choice. But the Distance is fine-tuned for running and scrambling, centering its weight higher on the shoulder blades for a bounce-free ride—so long as you don’t overload it. It also boasts a sturdier shell fabric and more functional front pocket organization. That said, the Fastpack offers a slightly larger capacity, a more refined fit, and better comfort with heavier loads, all while saving you $50. For more, read our BD Distance 22 review.

Mystery Ranch Gallagator 20 ($109): Speed on a Budget
Running vest-style daypacks tend to be pricey, but the Gallagator undercuts even the already affordable Fastpack. It’s slightly lighter, though its design—particularly the chest harness—feels less refined. Mystery Ranch’s trademark triple-zipper main compartment isn’t as intuitive as the Fastpack’s side-access zipper, and the Gallagator has a bulkier feel overall. That said, it still gets the job done if you’re looking for a vest-style daypack with moderate storage, and its price tag is hard to ignore. While it falls short of the Fastpack in organization and comfort, it’s still a solid budget-friendly alternative. For a deeper dive, see our review of the Gallagator 25.

Ultimate Direction Fastpack 20 ($160)
Ultimate Direction Fastpack 20 hiking daypack rear view
4.3/5

Despite the Fastpack 20’s specialized look, this pack can do almost anything. Add in its extremely reasonable price point, and you get one of our favorite overall models in this review. It does have some storage foibles, though.

Weight
1 lb. 4.8 oz.
Capacity
20L (30, 40L)
Hipbelt
Webbing
Suspension
Frameless
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Comfort & Support

3.5/5
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Organization

4/5
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Weight

4/5
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Durability

2/5
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Water Resistance

2/5
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Sustainability

1.2/5
Black Diamond Distance 22 ($220)
Hiking into sunset with Black Diamond Distance 22 daypack
4.6/5

The Distance wants to turn you into a mountain-eating speed demon. This light pack has storage for every gel packet and wicking layer you possess, and its beefy running vest-style harness hugs it close to your body on scrambles and trail runs. Make sure not to overload what little support it offers, though.

Weight
14.5 oz.
Capacity
22L (15L)
Hipbelt
None
Suspension
Frameless
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Comfort & Support

3/5
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Organization

4.5/5
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Weight

5/5
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Durability

3.5/5
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Water Resistance

3/5
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Sustainability

2.3/5
Mystery Ranch Gallagator 25 ($129)
Rear view of hiker wearing the Mystery Ranch Gallagator 25 hiking daypack
3.5/5

This fast-and-light pack has a busy aesthetic, with ample storage for technical missions and casual outings alike. The Gallagator 25 is also priced very competitively, although we think there are better running-oriented packs on the market.

Weight
1 lb. 6.4 oz.
Capacity
25L (10, 15, 20L)
Hipbelt
None
Suspension
Frameless
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Comfort & Support

2.5/5
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Organization

3/5
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Weight

4/5
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Durability

3/5
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Water Resistance

1.5/5
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Sustainability

1.7/5

Is the Gallagator 25 for You?

If you’re looking for a lightweight, vest-style pack that bridges the gap between a running vest and a hiking daypack, the Ultimate Direction Fastpack 20 is a strong choice. For those who like to move quickly on the trail—mixing running, hiking, and scrambling—its low weight, snug fit, and on-the-go storage make a compelling case. It’s certainly not the best option for hauling heavy loads or enduring rugged abuse, but for fast-moving days with a streamlined kit, the Fastpack 20 has real appeal.

Climbing down canyon wall wearing the Ultimate Direction Fastpack 20 hiking daypack

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