Swift X Hiking Backpack

Sale price$375.00

Material/Color: VX21 Coyote Brown

VX21 is a modern 4-layer fabric that is highly abrasion resistant, waterproof, and the perfect choice for a long hike or off-trail adventure.

Available in: Brown, Blue, Black

LS21 is a 3-layer laminate that utilizes spread technology. This waterproof fabric is strong and light.

Available in: Gray

Shoulder Harness:

Flight packs have 3 different shoulder harness options:

  • The Flight vest is a running-style vest that helps spread the load into one's core reducing pressure on the shoulders. This is our most popular option.
  • The Flight shoulder harness is a traditional strap system.
  • The S-Curve is designed to provide a comfortable fit for women.


  • Small: For those 5'7" tall or shorter
  • Large: For those taller than 5'7"

Shoulder Harness

Hip Belt:

Recommended Waist Size

Small: 26"-29"

Medium: 30"-35"

Large: 36"-50"

Hip Belt

Our award winning backpack designed with thru-hiking in mind.

50L Pack | Best for:

  • Thru Hiking
  • Bushwhacking and off trail travel
  • Triple Crown trails and long distance routes
In stock, ships within 1 business day*

Pickup available at 8250 Southwest Nimbus Avenue

Usually ready in 24 hours

Swift X Hiking Backpack

Swift X Hiking Backpack

VX21 Coyote Brown / Vest Harness - Large / Flight Hip Belt - Large

8250 Southwest Nimbus Avenue

Pickup available, usually ready in 24 hours

8250 Southwest Nimbus Avenue
Beaverton OR 97008
United States

⭐⭐⭐⭐⭐ Happiest 5 years and counting

"Have spent over 200 nights since first buying my Lunar Solo back in 2016. It has seen conditions to -20°C up to +38°C. Above the Arctic Circle into the deserts of Israel. Down from the Dead Sea up to the open Tundra. A great shelter for great adventures." - Andrei

Updated for 2023

The New Swift X

  • Interior pockets are now deeper allowing for a secure place for your passport, wallet etc…
  • All the stretch pockets have been upgraded to ultra-stretch
  • The pack now has 2 additional side straps so you can attach and secure the roll top either up top or on the side.
  • Six Moon Designs Logo and Pack name are now on a small woven label, and no longer silk screened to the woven stretch pockets




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

38.8 oz - 1100g Ultralight Backpack

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 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 27 oz. / 765 g.

In the Standard Configuration with added Stay and Hip Belt, and Flight Vest The Swift X weighs 38.8 oz. / 1100 g.

With the Vest Harness, you get additional stability in your load carrying and it brings the weight up to 40.2 oz. / 1151g.

Pack Organization

The Swift X provides ultimate functionality in a simple design. This ultralight backpack has a single roll-top main compartment that holds 41L with an additional 10L 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 harness or vest harness. 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 27 oz. at its lightest to 40 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.


Frame Configuration

The Swift X features a Delrin Hoop Stay Frame. 

Delrin Hoop Stay Frame Features:

  • Transfers load to the hip belt
  • Makes carrying heavy loads more comfortable
  • Reduces pack snag
  • Increases load carrying capacity by ~10 lbs | 4.5 kg

Recommended Base Weight: 12 lbs / 5.5 kg

Maximum Weight: 35 lbs / 15.8 kg

Frameless Configuration

The Swift X has the option to be configured without the use of the Delrin Hoop Stay Frame.

Frameless Features:

  • Decreases pack weight by 3 oz / 85 g
  • Great for fastpacking or super ultralight backpacking

Recommended Base Weight: 8 lbs / 3.5 kg

Maximum Weight: 25 lbs / 11kg

Harness Options

Flight Shoulder Harness

Shoulder Harness

✓ Traditional backpack shoulder straps

✓ Two 4-Way Stretch Pockets that hold 500ml soft bottles

✓ Sliding sternum strap

✓ Covers less torso area

✓ Weighs ~2 oz less than vest harness

Flight Vest Harness

Vest Harness

✓ Six points of suspension between the pack and user

✓ Eliminates sway or bounce when walking or running

✓ Transfers some of the load to your core

✓ Helps to eliminate sores on your shoulders and hips

✓ Helps to reduce back pain after long days on trail

✓ Provides extra storage pockets and quick-access options

Flight S-Curve Harness

S-Curve Harness

✓ Designed to accommodate people with narrow shoulders that have a larger chest area

✓ Two 4-Way Stretch Pockets that hold 500ml soft bottles

✓ Sliding sternum strap

✓ Avoids covering chest for more comfort

✓ Weighs ~2oz less than Vest Harness


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 points 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.




Flight Series

Torso Sizes

16" - 22" | 38 cm - 56 cm


11" x 7" x 22" (WDT) | 28 cm x 18 cm x 56 cm


Heather Grey, Black, Coyote Brown, Blue

Maximum Load

35 lb | 14 kg

Minimum Load

15 lb | 5.5 kg or less


Lightweight Backpacking
Long Distance Backpacking


Pack Body

LiteSkin LS21 or EPX 200

Body Contact

3D Mesh



2502 ci | 41 L

Extension Collar

610 | 10 L

Exterior Pockets

305 | 5 L

Total Volume

3417 ci | 56 L


LS21 & VX21 Body

21.3 oz | 604 g

Delrin Stay

3 oz | 85 g

Large Shoulder Strap

7.5 oz | 212 g

Medium Hip Belt

7.0 oz | 199 g

Total Weight

38.8 oz | 1100 g

Customer Reviews

Based on 39 reviews
William Murat
Happy trails

I’m very happy with my new Swift-X backpack. The pack is everything and more then i expected, light weight , ample size for all my gear and the many pockets to help keep things organized along my thru-hike. The new brown color is an added bonus making this pack so classic looking. Thanks to Bittergoat introducing me to six moons designs I’m finishing my A.T. thru hike better than I started. Thank you 6 Moons Design for making a lightweight backpack with and all the features and quality for a reasonable price.

Great pack

I’ve been thinking about buying a lightweight pack for a few years. Looked at quite a few recently and decided on the Swift X. Haven’t taken it out on a long hike yet, but it’s comfortable, looks well made and think I’ll love the vest harness, y-strap and other design features on my next long hike

Bruno T.
Swift X Hiking Backpack

Hi, I loved the concept of vest harness.
But to be honnest I'm very disappointed by the Swift X Hiking Backpack... After several tests, I have tried everything ! I also switched from the jacket to the harness, I also bought a belt one size smaller to reduce the load on the shoulders as much as possible. But nothing helps, my shoulders are destroyed after a few hours of walking with a bag weighing 32 pounds or less. I think the frame is not rigid enough and the weight is not distributed sufficiently across my belt. Do you have an aluminium frame, more rigid?
Best regards
Bruno Tanqueray

That Waist Belt!

I've been using this pack daily for the last few weeks on the Camino and the only flaw is that the waist belt chaffs because it doesn't have enough cushion. That should be fixed in the next go round.

wonderful customer service

I ordered the wrong size S-harness large, and it's too big for me. I am 5'8 female. they are very communicative and fast shipping to replace correct size small harness. It fits nicely.