Swift X Hiking Backpack

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
Liteskin LS07 Heather Gray
X-Pac VX07 Navy Blue
Liteskin LS21 Heather Gray
X-Pac VX21 Coyote Brown
X-Pac VX21 Blue
X-Pac VX21 Red
Shoulder Harness
Hip Belt

Customer Reviews

Based on 3 reviews Write a review

  • 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.
    • Suspension
      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
    • Body
      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

  • The Swift X

    By: Six Moon Designs
    Published: 01/31/2020

    Shoulder Straps or Vest Harness?

    By: Six Moon Designs
    Published: 02/06/2020
  • Swift X Backpack Review & Overview

    By: Tuba Solo the Hiker
    Published: 4/1/2020
Customer Reviews
3.4 Based on 8 Reviews
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Filter Reviews:
    Benjamin P.
    United States United States
    Swift X is crazy awesome!

    I cruised up the Alpine Lakes trails in Washington over steep boulders and quick switchbacks. I’ve never had a better fitting and more comfortable pack! I thru-hiked with an Osprey and had few complaints but the interior space and comfortability was nothing like this Swift. Can’t wait to test it on how much longer trip

    Brian b.
    United States United States
    Awsome pack

    Love this pack super light simple and just what you need. hiked 600 miles with it and will be my go to bag for fast and light trips. Love the vest straps, really hugs to your body , will say the bottom sternum strap does slide up while I was hiking, but it didnt really bother me. I'm excited to try it minus the frame and the hip belt for a seriously light weight fast pack love six moon designs gear I have the lunar solo, the fusion 65, and the deschutes plus tarp, along with the swift x across the board all great gear could not recommend them more cheers -noodle

    Six Moon Designs Swift X Hiking Backpack Review
    Kyle C.
    United States United States
    A light durable pack

    I intended to use the pack for my PCT thru-hike, but when the permit was canceled, the Swift X became my long day of adventure pack. The vest is a great for making snacks and all the other things you need throughout the day available. The pack material is super light, but has been very durable. The day the pack earned my approval was when I decided to toss it down about a 30 foot cliff to make the down climb easier and it landed on some sharp rocks with no ill effects. The mesh pockets on the sides and back are very roomy. There is little reason to have to enter the main compartment until you're ready to set up the tent for the night. The side pockets have room for water, jackets and more. A well designed and made pack from SMD

    Joseph E.
    United States United States
    Swift X Hiking Backpack Review

    Generally very good. Very light, excellent fit, seems to be well made and should be durable. A couple of things I would change: - There is no way to to cinch the rolltop to the sides. The top Y strap is fine, but there are times and loads that work better to the sides. It would be useful to have both options. - The sunglasses that I use (Opticus Altice Durango) are rather bulky and require a larger hard case than will fit into the shoulder strap bags - my preferred carrying point. Garmin GPS barely fits. Since the bags are not removable/replaceable, somewhat larger strap bags would be better.

    Richard S.
    United States United States
    Awesome but i really wanted a 50ltr pack

    Haven’t used it yet but on inspection I’m thrilled with it and can’t wait for next weekend. It’s quality personified, though, yes, expensive. Perfect example of - you get what you pay for. Just wish it came in a 50 let Suze.