Gray Six Moon Designs Swift X Ultralight Backpacking pack front
Gray Six Moon Designs Swift X Ultralight Backpacking pack corner
Gray Six Moon Designs Swift X Ultralight Backpacking pack w/ extension collar open
Gray Six Moon Designs Swift X Ultralight Backpacking pack rear showing UL Vest and hip belt
Gray Six Moon Designs Swift X Ultralight Backpacking pack rear
Blue Six Moon Designs Swift X Ultralight Backpacking pack front
Blue Six Moon Designs Swift X Ultralight Backpacking pack front corner
Blue Six Moon Designs Swift X Ultralight Backpacking pack rear showing UL Vest and hip belt
Blue Six Moon Designs Swift X Ultralight Backpacking pack rear showing UL Vest and hip belt
Swift X Hiking Backpack
Swift X Hiking Backpack
efficient ultralight backpack
efficient ultralight backpack
efficient ultralight backpack
Swift X Hiking Backpack
Swift X Hiking Backpack
Swift X Hiking Backpack
efficient ultralight backpack
Swift X Hiking Backpack
Swift X Hiking Backpack
Swift X Hiking Backpack
Swift X Hiking Backpack
Swift X Hiking Backpack

Swift X Hiking Backpack

Regular price$270.00

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36 oz - 1021 g Hiking Backpack

Streamlined and efficient, the Swift X is designed to go where you go.

The Swift X is a modern take on a time-tested design. Over 10 years ago, we designed the Swift. Ten years later, we’ve added some modern upgrades to create the Swift X. Constructed from lightweight, durable fabric, the Swift X joins our premium Zero-G line. This ultralight backpack’s simple, modular design means it easily configures to become your perfect pack for any adventure, be it a quick overnight trip or a calendar year triple crown.

The Swift is now offered in a VX21 and LS21 fabric weight. Both fabrics added only 1 oz of weight to the pack for 210 Denier Material Weight. When compared to the 70 Denier Material Weight of the VX07 and LS07, this added durability for the 1 oz weight penalty seemed like a no-brainer to us. For those counting grams, the VX07 and LS07 are still extremely durable, but those looking for an even burlier ultralight pack should consider the VX21.

Size Guide


The Swift X is designed to be lightweight, durable, and comfortable. Because we want the pack to be comfortable, the pack weight will vary depending on the configuration. Configured as a Frame-less pack with Pack Bag and Shoulder Straps, The Swift X comes in at 26 oz. / 737 g.

In the Standard Configuration with added Stay and Hip Belt, The Swift X weighs 36 oz. / 1021 g.

With the Vest Harness, you get additional stability in your load carrying and it brings the weight up to 37 oz. / 1049 g.

Pack Organization

The Swift X provides ultimate functionality in a simple design. This ultralight backpack has a single roll-top main compartment that holds 38L with an additional 6L extension collar. A Y-strap secures the load top and provides a convenient and easy attachment point for a bear barrel.

Intentionally designed, the Swift X gives you easy access to snacks, your phone, maps, and all those little things you need to keep close at hand. You’ll find you won’t even have the need to take the pack off until you hit camp at the end of the day.

The side water bottle pockets are made from 4-way stretch woven mesh. They are designed so that you can grab items easily while on the go.

Inside the main compartment, there is a zippered pocket for your wallet to keep it safe and secure and easy to access at the first sign of a burger joint.


The Swift X comes in a variety of configurations, so you can get the perfect fit for you and your needs. You can choose from a standard shoulder yoke or flight vest yoke. Each come in 2 sizes.

The Swift X also comes with a removable hip belt available in 3 sizes.

Between the adjustable torso length, removable hip belt, harness options, and removable Delrin Hoop Stay, The Swift X can be dialed in to your exact preferences. Each configuration ultimately changes the weight of the pack from 26 oz. at its lightest to 37 oz. at its heaviest.

While the material used in the Swift X is waterproof the, packs themselves are not water tight. We recommend using a 50L Pack Liner.



The Swift X comes with a removable Delrin Hoop Stay Frame. The ends of the hoop rest on the base of the hip belt, transferring the weight to the hip belt. This design feature makes carrying heavy loads more comfortable and reduces pack sag.

Using the Delrin Hoop Stay and hip belt together increases your load carrying capacity by approximately 10lbs*.

*We recommend a base weight of 12lbs or less even when increasing load weight and using the Delrin Hoop Stay and hip belt.


The Swift X is one of the only ultralight, frame-less pack on the market with an adjustable torso length. This allows the Swift X to provide unbridled comfort.

When configured as frame-less, the highest recommended base weight is 8lbs / 3.5k and maximum weight not exceeding 25lbs / 11k.

Using the Hoop Stay and Hip Belt increases your load carrying capacity by approximately 10 lbs / 4.5 k to 30+ lbs. / 14 kWhile you can carry additional weight, we still recommend a base weight of 12 lbs. / 5.5 k or less.


Vest Harness

Six Moon Designs’ unique vest harness supports a 6-point connection between the pack and your body. There are several advantages to this system:

1. It fully locks the pack to your body, eliminating sway or bouncing when you walk or run.

2. Instead of all of the weight of the pack resting on your shoulders and hips, the vest harness transfers some of that weight to your core. This reduces and eliminates sores from developing on the shoulders and hips.

3. The vest harness comes with extra pockets, providing additional quick-access storage options.


Because the vest harness spreads the load-bearing to the core, most hikers find it reduces back pain.

Founder Ron Moak discovered this first hand. After a bout with cancer, Moak found that he could only handle a couple of hours of hiking before needing to stop due to severe back pain. A vest harness redistributed the weight he was carrying on his shoulders and hips to his core, allowing him to walk more upright. This additional support allowed him to hike longer distances with less pain.

That’s why the first pack he designed incorporated the vest harness.

If you’ve found yourself unable to backpack as easily and as long as you once did, you may want to seriously consider the vest harness. We make no claims that the vest harness is a miracle cure, but it did help Moak get back to really enjoying backpacking again. And we hope it might help you, too.

Standard Shoulder Straps

There are several reasons you might choose a Standard Should Strap Harness:

1. If you’re used to carrying a traditional backpacking pack and aren’t from the running world, you will probably be comfortable with standard shoulder straps.

2. If you are a full-chested woman or broad-chested man, you might find the vest harness constricting. In this case, the S-Curve shoulder straps could provide a better hiking experience.

3. The standard shoulder straps are easier to slip out of if you want to take an extended break without the weight of your pack.


  • Adjustable Torso Length
  • Three Shoulder strap Style options (Shoulder Harness, S-Curve or Vest Harness)
  • Three Exterior Woven Pockets so you only have to unload your pack when its time to set up camp.
    • Rear Pocket
    • Two Side Pockets
  • Breathable and Durable 4-way Stretch Material
  • Large Shoulder Strap Pockets to keep things close at hand
  • Removable Hip Belt
  • Minimal Contact Back Panel
  • Top Loading with Dry Bag Closure
  • Internal Zippered Stash Pocket For your wallet and other small necessities
  • Multiple Point Cord Compression System to keep your load stabilized no matter the size
  • Single Ice Axe or Trekking pole attachment point
  • Two layers of material in key point to strengthen the pack and prevent holes.
  • Dual Hydration Ports
  • Removable Hydration Bladder
  • Sliding Sternum Straps on Vest and Shoulder Harness
  • Delrin Hoop Stay for added support on those heavy load days.



Torso Sizes

Maximum Load
Minimum Load

Flight Series
16" - 22" | 38 - 56 cm

11"W X 7"D X 22"T
Heather Grey, Navy, Coyote Brown, Blue, Red
35 lb - 14 kg
15 lb - 5.5 kg or less
Lightweight Backpacking
Long Distance Backpacking


Pack Body

Body Contact
LiteSkin LS07, LS21
or  X-Pac VX07, VX21

3D Mesh
4-Way Stretch


Extension Collar
Exterior Pockets

Total Volume
2319 ci - 38 L
366 - 6 L
305 - 5 L

2990 ci - 49 L


LS07 & VX07 Body
VX21 & VX21 Body
Delrin Stay
Shoulder Strap
Hip Belt

Total Weight:
LS07 & VX07 Weight
LS21 &VX21 Weight
19.7 oz - 558 g
20.6 oz - 584 g
3 oz - 85 g
5.7 oz - 162 g
6.5 oz - 184 g

34.8 oz - 989 g
35.8 oz - 1015 g


Swift X Hiking Backpack

By: Six Moon Designs
Published: 09/22/2020

Shoulder Straps or Vest Harness?

By: Six Moon Designs
Published: 02/06/2020

Swift X & Swift V Overview

By: Six Moon Designs
Published: 07/29/2021

User Video

Swift X Backpack Review & Overview

By: Tuba Solo the Hiker
Published: 4/1/2020

Gear Reviews


Customer Reviews

Based on 21 reviews
andrew oliver
Overall good pack

So far this review is subject to change. I have not had the pleasure of taking the pack out into the backcountry yet. However, upon first inspection the pack has some very lovable and fitting features. This pack was bought for my wife. She is 120 lbs 5ft 3” tall and got the small harness with a medium hip belt. Like most women she has a wider hip structure so we opted for the medium. The only complaints I can say I have is that I don’t love that the derlin hoop is exposed inside the pack. It could pose issues trying to stuff or pull something out. But, like I said above, this is only on inspection. Not hard facts and miles proven. My second I would say isn’t a complaint but more of an assessment. The LS07 material seems very thin and strange feeling if I can even say that. I’m unsure as to how the durability testing will be. But if my research on xpac and ls material it’s pretty tough material. Being a dyneema guy myself I’m interested as to how it will test on trail, bush whacking and normal wear. However I did try the pack in with weight and the harness system is a no brainer. Absolutely great fit for women and men alike. The pack really does hug you like a little monkey riding on your back. The storage options is endless. And the small stash pocket inside almost eliminates the need for a supplemental Fanny pack. I really love that for an ultralight package you have a frame and load lifters. Overall a clutch piece of gear. If six moons sent me one to beat up, I wouldn’t complain about it. Nor be mad about it. It’s a nice pack. And for most will satisfy all your needs and then some.

Clint Lawrence
Best pack I’ve ever had!

I’ve put away about 1,000 miles in the backcountry in the past few years and never have had a pack that distributes the weight so well and feels so good. And it is a beautiful design. Thank you!

fabian vazquez
Bag of gods

Lightweight, comfortable, perfection

Great product, small improvement

The pack is very comfortable and has held very well over the miles I’ve done. The ONE improvement I’d like to see is a more firm replacement for the frame. When really trying to use all the space, the frame allows the contents to push the lumbar pad very uncomfortably into your lower back. Not a big deal, just had to experiment with different ways to pack it to eliminate the problem. Great pack all in all.

Not a pack for the short/small

I really really wanted to love this pack. So much so I’ve been trying to make it work for the past year but I’m finally coming to terms that it’s just not a pack designed for short or small people. I’m 5’3” and on the smaller side overall and the pack just isn’t right for my torso/frame. It sits low and too high from my shoulders. I’m able to play around with the vest back adjustments but it never feels just right like I know a pack should. Even when I pack for only an overnight or use it for a day hike from a base camp (no overnight gear) it feels massive and awkward for me to wear. I’m not leaving this review to tarnish the pack because it’s a great pack with a lot to offer, more so to give a heads up to other short/small folk to consider the fit a lot more than I did