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GOSSAMER GEAR Gorilla 40 - is a top loading backpack with a total capacity of 40 liters (including extension collar), with 28 liters of space in the main compartment and the rest divided among the pack’s other pockets. 

According to Outdoor Gear Lab’s Editor’s Choice it is the best mid-volume light backpack. Its versatility, durability and comfort make it the best weekend companion you’ll ever have. Also works on longer trips and through hikes with itineraries including grocery/laundry opportunities.

The main compartment features an internal hydration sleeve to hold a hydration pack with a hang loop at the top for securing it and two hydration ports located above both shoulder straps to let you route the drinking hose over either shoulder.

It is made of Robic nylon fabric. 100D Robic nylon is used for the main pack and thicker more durable and abrasion-resistant 200D Robic nylon in critical areas - bottom of the pack and the side pockets. Robic fabric is waterproof and sheds water well in rain, but the backpack is not completely waterproof and leak at the seams which are not sealed, so we recommend to use waterproof stuff sacks or line the pack with the plastic bag to protect your gear against rain and moisture.

Read detailed Review from Outdoorgearlab:

"This model is the best do-everything ultralight backpack we tested. When we needed to carry winter gear and five days of food on the Appalachian Trail in January, it was just the right size. When we wanted to strip it down for day hikes or one night out in the wilderness, the frame and waist belt were easily removable. The exterior storage pockets were also perfect for our testers, keeping snacks, water bottles, and extra clothing layers easily accessible. Whether you're thru-hiking for months or playing in the backcountry for the weekend, this pack is perfect."
The price is final with hipbelt included. Please write us in the note of your order appropriate size of the hipbelt you want to add to the backpack. For appropriate size check our size chart. In case of any questions please do not hesitate to contact us.


  • Belt with added stiffener and stay integration for superior load transfer and comfort
  • New buckles on side compression
  • Unisex ergonomic belt shape
  • 3 hipbelt size options for a more custom fit
  • Tabs for attaching the fast belt and going frameless
  • Unisex ergonomic harness for both men and women
  • Dual exit hydration tube exit port
  • Internal hydration sleeve and drinking tube keeper loops on both shoulder straps
  • Two side mesh bottle pockets accessible while wearing pack
  • Full side and top compression
  • Air-mesh fabric on shoulder straps and hipbelt for less friction, more cushion and more comfort
  • Rear mesh pocket great for drying gear and other gear storage
  • Trekking pole hardware for storing them outside the pack
  • Made of our custom 70 and 100 denier Robic nylon
  • Lash loop for ice axe
  • Includes a SitLight pad and a removable stay
  • Updated hipbelt with stay coupler
  • Recommended for loads of 30 pounds or less


Custom 70 denier Robic ripstop nylon

Select use of 100 denier Robic nylon for reinforcement

Air mesh fabric for harness lining

Power mesh fabric pad holder

Custom stretch mesh fabric for big back pocket


40 L total

28.8 L in main pack body to extension collar seam

14 kg (30 lbs) recommended maximum carry capacity, 11 kg (25 lbs) for comfort

WEIGHT  (Medium)

Pack body: 521 g / 18.4 oz

Pack frame:  85 g / 3.0 oz

Sitlight pad: 60 g / 2.1 oz

Total with no belt: 581 g / 20.5 oz

Total with small belt: 844 g / 29.8 oz

Total with medium belt: 865 g / 30.5 oz

Total with large belt: 884 g / 31.2 oz

WEIGHT Hipbelt

Small belt: 181 g / 6.3 oz

Medium belt: 199 g / 7.0 oz

Large belt:  218 g / 7.7 oz


Height  55.9 cm / 22” to extension collar seam

Width 27.9 cm / 11”

Depth 15.2 cm / 6”

Extension collar adds another 29.2 cm /11.5”  of height

Gossamer Gear Gorilla 40 features

Data sheet
Weight884 g
Warranty2 years

Backpack Size (Varies greatly depending on body type and how you wear your pack). Watch video: How to fit Gossamer Gear backpack

How to Measure your Torso size and Hipbelt size

BACKPACK SIZEcminchGenerally fits people with height
SMALL34,3 cm (29 - 41 cm torso)13.5” (11.5" - 15.5" torso)
168 cm / 5' 6" and under
MEDIUM44,4 cm (41 - 50 cm torso) 17.5” (16" - 19" torso)165 cm to 180 cm (5'5" to 5'11")
LARGE55 cm (49 - 60+ cm torso)21.5” (19.5" - 23.5" torso) 178 cm and up

Hipbelt size

SMALL61 - 86 cm waist24" - 34" waist
MEDIUM76 - 101 cm waist30" - 40" waist
LARGE91.4 - 127 cm waist38" - 50" wiast

Gossamer Gear fit backpack

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    30 days return policy
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  • Express delivery
    Express delivery
    Next day delivery to all EU countries.

    Express delivery

    Choose Express delivery and you can start using gear the very next day.

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    Valid for all orders over 300 € within EU.

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