Six Moon Designs Swift X
Ultralight Pack
~$350

Six Moon Designs

Six Moon Designs Swift X

4.7(42 reviews)

The Swift X is the X-Pac version of Six Moon Designs' Swift, using the same Delrin hoop frame as the Swift V but in a waterproof laminate. At 38.8 oz it is heavier than most packs in this segment, which is the cost of the hoop and the fabric.

Approx. price
~$350
Capacity
50 L
Weight
2.43 lbs
Best For
Hikers wanting a flexible hoop frame in a waterproof laminate
Buy from Six Moon Designs

Price and availability on Six Moon Designs’s site may differ.

Type
Ultralight Pack
Frame Type
Internal Frame
Capacity
50 L
Weight
2.43 lbs
Max Recommended Load
Not specified by the manufacturer
Torso Fit
See manufacturer sizing
Material
X-Pac laminate with Ultra Stretch pockets
Back Panel
Delrin hoop stay frame
Warranty
Manufacturer warranty; terms not published
Raincover Included
No
Fits BV500 Bear Canister
No

Features

Hipbelt Pockets

Pros

  • X-Pac laminate is waterproof rather than merely treated.
  • The Delrin hoop flexes with body movement instead of resisting it.
  • Ultra Stretch pockets hold shape better than plain mesh.
  • 50 L covers a bear canister and several days of food.
  • Six Moon Designs has one of the longest track records among cottage makers.
  • The hoop frame has no stays to bend or lose.
  • $350 is mid-range for a laminate pack from an established maker.
  • Hipbelt pockets included.

Cons

  • 38.8 oz makes it one of the heaviest packs in this ultralight segment.
  • $100 more than the Swift V for the fabric change alone.
  • No published maximum load figure.
  • A Delrin hoop is less rigid than aluminium stays under heavy loads.
  • No adjustable torso.
  • X-Pac is harder to field-repair than the Swift V's woven Robic.
  • Six Moon Designs' own site shows only sale pricing, so MSRP came from a review.
  • Limited retail presence for in-person fitting.

Common Questions

🎒
~$275
Ultralight Pack

Six Moon Designs

Six Moon Designs Swift V

The Swift V uses a Delrin hoop rather than metal stays, a design Six Moon Designs has refined over several generations. It is the heaviest pack in this ultralight group at 38 oz, trading weight for a frame that flexes with the body.

50 L2.38 lbs100D Robic nylon

Weight

2.38 lbs

Capacity

50 L

Frame

Internal Frame

Best for: Hikers who want a flexible hoop frame and a conventional fabric
🎒
~$350
Ultralight Pack

The Cutaway is Nashville Pack's frameless 40 L, built around a cutaway front panel that lets the mesh pocket expand rather than being pinched by the pack body. At 22 oz it sits between the Pa'lante V2 and the framed cottage packs.

40 L1.38 lbs210D Venom Gridstop ECO

Weight

1.38 lbs

Capacity

40 L

Frame

Frameless

Best for: Thru-hikers with low base weights who want more volume than a 37 L frameless pack
Hyperlite Mountain Gear Contour 35
~$350
Ultralight Pack

Hyperlite Mountain Gear

Hyperlite Mountain Gear Contour 35

The Contour 35 is Hyperlite's frameless fast-and-light pack, and at 15.9 oz it is the only sub-pound pack in this catalog outside the Cotopaxi Batac. Dyneema Composite Fabric makes it effectively waterproof at a weight woven fabrics cannot reach.

35 L0.99 lbsDCF with Dyneema Gridstop and stretch mesh

Weight

0.99 lbs

Capacity

35 L

Frame

Frameless

Best for: Fastpacking and low-base-weight trips where every ounce is counted
🎒
~$369
Ultralight Pack

The Bonfus Framus is a 58 L framed pack at 26.6 oz, built in Challenge Ultra 200X -- a non-woven laminate with UHMWPE fibres that is effectively waterproof and extremely tear-resistant. Its weight-to-volume ratio is among the best of any framed pack here.

58 L1.66 lbsChallenge Ultra 200X

Weight

1.66 lbs

Capacity

58 L

Frame

Internal Frame

Best for: Long thru-hikes where a framed pack is wanted but weight is critical
Osprey Exos Pro 55
~$330
Ultralight Pack
4.1(37)

The Exos Pro is Osprey's answer to the cottage ultralight brands: 33.2 oz for 55 L, or 30.4 oz with the lid removed. It uses NanoFly, a 100D nylon crossed with 200D UHMWPE, over a 3.5 mm LightWire frame, and saves nearly a full pound against the standard Exos 58 at the cost of load rating and a fixed hipbelt.

55 L2.08 lbsRemovable LidVentilated back

Weight

2.08 lbs

Capacity

55 L

Frame

Internal Frame

Best for: Thru-hikers with sub-30 lb loads who still want a suspended-mesh frame
Outdoor Vitals CS40 Ultra
~$330
Ultralight Pack

The CS40 Ultra pairs Challenge UltraWeave 200 with carbon fibre stays for 28.6 oz at 53 L. Outdoor Vitals sells direct, which is why the price sits below comparable cottage packs using the same fabric.

53 L1.79 lbsChallenge UltraWeave 200

Weight

1.79 lbs

Capacity

53 L

Frame

Internal Frame

Best for: Thru-hikers wanting an Ultra-fabric framed pack without cottage-brand lead times