Fjörm Backpack 18L

Fjörm 18L with the lid open — red drawcord collar of the main compartment, Slate Brown version

Hands holding the Fjörm 18L in Slate Brown to show the ventilated 3D mesh back panel

Side mesh pocket of the Fjörm 18L in Slate Brown holding a pair of gloves, worn close-up

Close-up of the Fjörm 18L shoulder straps, sternum strap and webbing hip belt while worn

Woman wearing the Fjörm 18L in Slate Brown — front view with sternum strap fastened

Woman wearing the Fjörm 18L in Slate Brown — side view of the compact summit pack

Woman wearing the Klättermusen Fjörm 18L in Slate Brown — back view of the summit pack

Woman wearing the Fjörm 18L in Slate Brown — three-quarter back view with mesh side pocket

Klättermusen Fjörm Backpack 18L in Raven — front view with mesh front pocket and red buckle

Fjörm Backpack 18L in Raven — back view with ventilated 3D mesh back panel and webbing hip belt

Close-up of the Fjörm 18L ventilated 3D mesh back panel and 4-S sternum strap in Raven

136.00€ 170.00€

Betaal in 3 of 4 termijnen met Alma

☔ Fully Taped Seams - no rain cover to carry
🌬️ 3D Mesh Back and Straps - air moves on the climb
🎯 4-S Sternum Strap - tension spreads as you move
🪨 Hardur Reinforced Base - takes being set on rock
⚖️ 448 g Summit Pack - built for a 3 kg load

Kleur:

Slate Brown

Raven

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Fjörm Backpack 18L Slate Brown136.00€

AFMETINGEN

48 cm x 24 cm x 16 cm
18,9" x 9,4" x 6,3" (H x W x D)
VOLUME

18 L
4,8 gal
GEWICHT

448 g
1,0 lbs

Fjörm Backpack 18L - Fully Taped Summit Pack for Fast Days (448 g)

Most light packs deal with rain by handing you a cover to fish out of a pocket with wet hands. The Klättermusen Fjörm Backpack 18L deals with it in the factory instead: the construction is fully taped, the seams are sealed and the weather stops at the fabric.

That is an unusual thing to find at 448 g, and it changes what you pack. No cover, no dry bag for the mid-layer, no pause on the ridge while the squall goes through.

Access is built for speed: a single-point closure opens the top lid in one pull. The back is where the money went, with 3D mesh on the straps and the back panel and a 4-S sternum strap that spreads tension as you move. Two oversized mesh pockets take the bottle and the gloves without opening the pack at all.

Who is it for?

Fast hikers, summit pushes and alpine approaches where the weather is part of the plan. If you move quickly, carry little and would rather not stop to put on a rain cover, this is the pack that was built for your day.

What Makes the Real Difference in Bad Weather

Eighteen litres does not leave room for anything decorative. Every choice on the Fjörm is about staying dry, staying cool and not stopping.

✔️ Fully taped construction: the seams are sealed, so the pack handles weather without a rain cover.
✔️ Single-point closure: the top lid opens in one pull, with gloves on.
✔️ Cinch opening: a second, faster way in when you only need one thing.
✔️ 3D mesh straps and back panel: air moves across your back on the climb instead of pooling against it.
✔️ 4-S sternum strap: spreads tension as you move rather than pulling on a single fixed point.
✔️ Hardur® reinforced bottom: an aramid blend at 280 g/m² where the pack meets rock.

At 448 g the pack disappears once it is loaded, which is the highest compliment you can pay a summit pack.

Who This Pack Is For

The Fjörm is a specialist, and it is worth being clear about what it specialises in.

You move fast on trails, ridges and alpine approaches, and carry only what the day needs.
You go out in weather and want the pack itself to be the protection.
You sweat on climbs and need real ventilation at both the straps and the back panel.
You scramble and want a reinforced bottom that survives being set down on rock.
You want recycled fabric that is bluesign® approved and GRS certified rather than a claim on a swing tag.

The honest limit is written into the spec sheet: the recommended load is 3 kg. This is a summit pack, not a load carrier, and there is no hip belt to move weight off your shoulders. For a full day with more food, water and layers, the Gilling Backpack 20L carries more comfortably.

Within the Klättermusen range, the Fjörm sits just above the minimal Tjalve 2.0 Backpack 10L. If you want a lighter, less weatherproof pack from another house for the same fast pace, the Patagonia Atom Daypack 24L is the obvious comparison.

Technical Specs - Fjörm Backpack 18L

Brand: Klättermusen
Product type: Weatherproof summit pack / fast hiking backpack
Volume: 18 L
Weight: 448 g
Dimensions: 48 × 24 × 16 cm (H × W × D)
Recommended carry weight: Up to 3 kg
Main fabric: Retina® Maxima, Seawastex - 100% post-consumer recycled polyamide
Fabric weight: 200D - 214 g/m²
Reinforcement: Hardur® - 65% polyamide, 22% polyester, 13% aramid, 280 g/m² (bottom)
Coating: SkylCoat and TPU coating
Water resistance: >10 000 mm on the main fabric, >7 000 mm on the wear protection
Construction: Fully taped seams
Certifications: bluesign® approved fabric, GRS (Global Recycled Standard)
Fluorocarbon / PFAS-free: Yes
Access: Single-point closure top lid entry, cinch opening
Pockets: Two oversized external mesh pockets
Carry system: 3D mesh shoulder straps and back panel, 4-S sternum strap
Compatible accessories: Bottle holder, communicator pocket
Colours: Raven, Slate Brown
Made in: Vietnam
Use cases: Fast hiking, summit pushes, alpine approaches, trekking in changeable weather

FAQ

Does the Fjörm 18L need a rain cover?

No. The construction is fully taped and the main fabric is rated above 10 000 mm water column, so the pack is the weather protection. It is not a submersible dry bag, but for rain, sleet and spindrift you do not need to carry a cover.

How much weight can I carry in it?

Klättermusen recommends up to 3 kg. That is a genuine summit-pack figure: water, food, a shell, gloves and a first aid kit. Beyond that the load sits on your shoulders, because there is no hip belt to transfer it. For heavier days, look at the Gilling Backpack 20L.

What is the 4-S sternum strap?

It is Klättermusen's sternum system that distributes tension dynamically rather than anchoring the shoulder straps at one fixed point. In practice the straps keep following your chest as you breathe hard and move, instead of digging in at a single spot.

Is 18 litres enough for a day hike?

For a fast day, yes. Eighteen litres takes water, food, a shell layer, a warm layer and the small safety kit, with the bottle and gloves living in the two external mesh pockets. If your day involves a picnic, a camera and spare boots, it is the wrong size.

How does the pack open?

Two ways. A single-point closure releases the top lid in one pull, and a cinch opening underneath gives faster access when you only need one item. Both work with gloves on.

Will the bottom wear through on rock?

The bottom is reinforced with Hardur®, a 280 g/m² blend of polyamide, polyester and 13% aramid, the same family of fibre used in cut-resistant gear. It is the panel Klättermusen expects to take abuse, and it is rated above 7 000 mm on its own.

How do I clean and maintain it?

Wipe the fabric with lukewarm water and a soft cloth, and rinse mud off the mesh pockets before it dries in. No machine wash, no tumble dryer, no solvents: they attack the coating and the seam tape. Dry it open, away from direct heat.