How much weight can a frameless pack like this comfortably carry?

Frameless packs work best with base weights under 10 pounds and total loads under 20 pounds including food and water. Beyond that, the lack of frame makes the pack less comfortable because the load rests directly on your shoulders and back without structural support to distribute it.

What does it mean that the fabric is fused at the molecular level?

The polyethylene layers are bonded together through a fusion process rather than with adhesive. Traditional laminates use glue to hold layers together, which can fail over time as the adhesive degrades from moisture and flexing. Molecular fusion creates a single continuous material with no glue to separate, so the fabric won't delaminate.

Will this pack work for multi-day trips?

Yes, if you pack light. At 36 liters, it holds enough for multi-day trips when you're carrying ultralight gear, minimal clothing, and compressed sleeping systems. It's designed for the kind of backpacking where every piece of gear is chosen for low weight and small packed size.

Is the torso pad removable if I want to save even more weight?

The torso pad is a separate piece that ships with the pack, so you can choose whether to use it. Removing it saves a small amount of weight, though the pad is already quite light at 3/8 inch thick. Some people prefer the added comfort, especially on longer days.

Murmur 36 Hyperlight Backpack

waterproof

The 3-second version

Built from polyethylene fused at molecular level with no adhesives
Weighs 7.9 ounces with included 3/8-inch torso pad
Waterproof fabric that won't delaminate or fray over time
Frameless—needs careful packing for comfort
Best for light loads only
Requires deliberate weight distribution

Why it's on GiftsFeed

Murmur 36 Hyperlight Backpack

Most ultralight packs sacrifice durability for weight, using fabrics thin enough that a sharp branch becomes a repair project. This one uses a construction method that eliminates the weak points where traditional laminates fail—the adhesive bonds that eventually let go after enough flexing and moisture exposure.

The molecular fusion approach creates a single-piece material that stays intact through the kind of use that would separate a glued laminate. That matters if you're counting on this pack over multiple seasons, not just one careful thru-hike. The weight saving is real, but it doesn't come from making the fabric thinner—it comes from removing the adhesive layers and coatings that other waterproof fabrics require.

Good gift when

Ultralight backpackers who measure gear weight in ounces
People moving to frameless packs from traditional designs
Hikers who want waterproof fabric without laminate failure
Minimalists who pack strategically rather than heavily

Skip it if If you carry heavy loads or prefer the structure and support of a framed pack, this frameless design will feel unsupportive and uncomfortable, especially over distance.

Specs

Capacity: 36 liters
Weight: 7.9 ounces
Fabric: Aluula Graflyte V52 polyethylene
Front pocket material: UHMWPE stretch mesh
Included accessories: 3/8-inch torso pad
Frame: Frameless
Waterproof: Yes

What's included

3/8-inch torso pad

If you're giving it

No sizing to guess

Ships with torso pad included; no assembly or fitting required.

The details

This is a 36-liter frameless backpack that weighs 7.9 ounces, built from a fabric that fuses polyethylene at the molecular level rather than bonding layers with adhesives. The result is a waterproof shell that won't fray at the edges or separate into its component layers over time, the way traditional laminates eventually do when the glue fails.

The construction method creates a single continuous material rather than a sandwich of films pressed together. That means no coatings to rub off and no point where one layer peels away from another. The fabric itself is called Graflyte V52, and it delivers both weather protection and durability at a weight that makes traditional pack fabrics look heavy.

The front panel uses UHMWPE stretch mesh, a high-tensile-strength material that holds gear securely while giving you a clear view of what's stored there. It stretches to accommodate bulky items but doesn't sag under load. A 3/8-inch torso pad ships with the pack to add a buffer between your back and your gear without piling on weight.

Because the pack is frameless, it works best when you load it thoughtfully. Soft items against your back, heavier pieces in the middle, lighter gear up top. The design assumes you're carrying a load measured in ounces, not pounds, and that you'll pack with intention rather than stuffing it full and hoping for comfort. When you do, the lack of frame becomes an advantage: the pack conforms to your movements instead of holding a rigid shape, and you carry less structural material on every mile.

Gossamer Gear

Murmur 36 Hyperlight Backpack

Molecular-fused waterproof fabric in a 7.9-ounce frameless pack

$350at gossamergear.com

Quantity

Buy from Gossamer Gear

Ships and sold by Gossamer Gear. About this merchant

The 3-second version

Built from polyethylene fused at molecular level with no adhesives
Weighs 7.9 ounces with included 3/8-inch torso pad
Waterproof fabric that won't delaminate or fray over time
Frameless—needs careful packing for comfort
Best for light loads only
Requires deliberate weight distribution

Cheaper alternatives

Questions

How much weight can a frameless pack like this comfortably carry?: Frameless packs work best with base weights under 10 pounds and total loads under 20 pounds including food and water. Beyond that, the lack of frame makes the pack less comfortable because the load rests directly on your shoulders and back without structural support to distribute it.
What does it mean that the fabric is fused at the molecular level?: The polyethylene layers are bonded together through a fusion process rather than with adhesive. Traditional laminates use glue to hold layers together, which can fail over time as the adhesive degrades from moisture and flexing. Molecular fusion creates a single continuous material with no glue to separate, so the fabric won't delaminate.
Will this pack work for multi-day trips?: Yes, if you pack light. At 36 liters, it holds enough for multi-day trips when you're carrying ultralight gear, minimal clothing, and compressed sleeping systems. It's designed for the kind of backpacking where every piece of gear is chosen for low weight and small packed size.
Is the torso pad removable if I want to save even more weight?: The torso pad is a separate piece that ships with the pack, so you can choose whether to use it. Removing it saves a small amount of weight, though the pad is already quite light at 3/8 inch thick. Some people prefer the added comfort, especially on longer days.