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Gossamer Gear G4-20 Ultralight 42 Backpack

Ultra-lightweight all-purpose backpack.

Customer reviews 93% 3 ratings

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616 g Weight in grams. We check the weight of almost all items thus our weight information is often more precise than the one given by manufacturers.
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 225.80 (  186.61 excl. VAT)

Product information

  • Manufacturer: Gossamer Gear
  • Product code: TM_G4_M
  • EAN: 0810148550721

Gossamer Gear G4-20 is an ultralight backpack suitable for treks and pilgrimages, but also for shorter trips. It is a new version of the G4 backpack, designed by the founder of the American brand Gossamer Gear Glen Van Peski many years ago.

It fits right in between the popular Kumo and Gorilla models in the Gossamer Gear range and has quickly become a best seller. At 42 litres, the pack is almost 200g lighter (!) than the Gorilla model with an additional waist belt. The lower weight has been achieved by cutting down some of the elements. In particular, the G4-20 does not have a rigid frame, so it holds its shape a bit less well, but this is not a major problem. The waist belt on the G4 is fixed and is part of the pack, so you can't choose its size, which can be a disadvantage for some body types. The G4-20 also lacks an internal back pocket for a hydration pack.

There is a new, more rigid type of reinforcement in the back that serves as a very practical removable seat. Compared to the Kumo, the G4-20 mainly offers more volume and a significantly more massive hip belt, thus better transferring more load to the hips.

In the S and M size and when filled to the appropriate limits using the compression straps, it can also be taken as hand luggage on the plane.

  • optional size
  • large pockets


  • main space
  • outer pocket on lid
  • front stretch mesh pocket, e.g. for wet clothes
  • spacious side pockets
  • 2 pockets on the waist belt


  • axe holder
  • handle for hydration systems
  • loops on the pack for possible placement of additional lanyards (not included)
  • rolling closure system with two closure options
  • waterproof zipper
  • removable back pad that can be used as a seat
  • fixed waist belt included


Accessories can be purchased with the backpack. Not included.


Have the length of your spine measured from the level of the iliac crest (the top of the bone on the side of your back) to the C7 vertebrae at the base of your neck. This is the top of the first vertebra that protrudes when the head is tilted.

Backpack size S M L
Torso 29-40 cm 40-50 cm 50-60 cm
Hip 63,5-89 cm 76-107 cm 81-127 cm


Volume 42 l
Height 50 cm (S)
55 cm (M)
60 cm (L)
minimal height - packed backpack can be higher
Width 27 cm
Depth 17 cm
Maximum load 13 kg
Recommended load 11 kg
Back length 29 - 40 cm (S)
40 - 50 cm (M)
50 - 60+ cm (L)
Material 70D & 100D Recycled Robic Nylon
PFAS free
Weight 616 g (S)
660 g (M)
715 g (L)
(weighed in Pod 7 kilo)

Photos (6)

Reviews (2)

Customer reviews 93% Rating (How do we rate products?)

  • Reviews with ratings 5
  • Reviews with ratings 4
  • Reviews with ratings 3
  • Reviews with ratings 2
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Skvělý výrobek, nízká hmotnost, multifunkční využití

Verified customer

2024/05/16 08:30

Presiel som s nim stovky km. Jedine poskodenie za tie km bol natrhnuty bedrovy pas. Mojou vinou samozrejme, pri viac dnovych trekoch som ho obcas pretazil. Oprava u sikovnej krajcirky ma stala 5 eur. Mam a mal som niekolko batohov, no uzatvaranie tohto je za mna to naj. Bezne sa s vahou pohybujem niekde na 10 kg a pri tejto vahe je komfort uplna parada. Akonahle ho pretazim, komfort samozrejme klesa. Na popruhoch mam kapsu na plasu a kapsu na telefon. Super doplnky. Idem si doobjednat výstuhu zad Gossamer Gear Air Flow Sitlight Camp seat, ta original nie je nic moc. Uz je osuchana, pokrutena. Ale je to super vec. Pouzivam hlavne ako podsedak. Dufam, ze ta nova je pevnejsia a lepsie odvhadza pot. Takze za mna 5 hviezdiciek urcite.

Stefan Ka

2024/01/27 10:14

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