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The Jervenbag King Size - Mountain Camo

Jerven AS

The Jervenbag King Size - Mountain Camo


Brand: Jerven AS
  EAN 7090008960089
Weight: 1880 g         5 reviews
The Jerven Bag Thermo King Size is a windproof, waterproof and versatile shelter for hunters, nature watchers and photographers. Primarily designed as a protective poncho for use when hunting, the Jerven Bag is equally suited as a windsack when sitting outdoors, a rain cover for you and your rucksack when hiking, an emergency tarp-style shelter, or a sleeping bag cover. Its versatility and thoughtful design are just two of the reasons why Ray Mears has become a fan of the Jerven Bag.

Jerven have produced a number of different models of their Jerven Bag or 'Fjellduken' as it is known locally, including the Extreme, Original and Hunter. This, the King Size Jerven Bag, is the largest of all four models, measuring a spacious 143 x 220 cm. As such, the King Size can be used by one or two people, and is generally the model of choice for users over 6' 2" and weighing more than 15 stone. Due to its size, the King Size model is arguably the most useful Jerven Bag, allowing the wearer to really stretch out and rest, all the while being kept warm and dry. As such, it is best suited for the hunter, fisherman, hiker or outdoorsman for whom comfort is paramount.

A key feature of the King Size model is an insulative filling of 60 g Primaloft padding. This blend of ultra-fine microfibres helps to trap and retain the wearer's body heat while letting cold air escape. Primaloft is warmer, drier, softer and more compressible than any other synthetic insulation, making the Hunter Bag extremely comfortable to wear. The wind and waterproof outer is adorned with a complex mountain camouflage pattern, helping the wearer to blend in with a variety of environments while keeping them protected from the elements.

Primaloft is a blend of ultra-fine microfibres which help to trap and retain the wearer's body heat while letting cold air escape. Primaloft is warmer, drier, softer and more compressible than any other synthetic insulation, making the Jerven Bag Extreme very comfortable to use.

The Jerven Bag features zips around three edges, allowing you to adjust its shape as per the desired usage. Made from polyester, it features an aluminium coating which helps to reflect body heat back to the wearer, much in the same way as a survival bag works. A pair of 3/4 length sleeves are included, which can be attached or detached as you wish.

For over 30 years, Jerven AS have supplied their specially created Fjellduken protective tarp to the Norwegian Armed Forces. In 2004 alone, Jerven delivered around 7,000 Jerven Bags to various Norwegian military divisions, and now also supply French, Danish, Swiss and British special forces.

  • Windproof
  • Waterproof
  • Non-breathable
  • Outer: Aluminium-coated polyester
  • Inner: Polyester Ripstop polyamide
  • Filling: 60 g Primaloft padding
  • Reflects body heat
  • Dimensions (unzipped): 286 x 220 cm
  • Dimesions (zipped): 143 x 220 cm
  • Weight: 1900 g
  • Colour: Mountain Camo
  • Warranty: 10 years
  • Includes: Detachable sleeves, rescue flag and cushion bag


  Next day delivery within the United Kingdom
  UK Orders placed before 2PM GMT will be dispatched the same working day
  Overseas delivery times will vary depending on the destination

Please note that our offices are closed at weekends, so any orders placed after 2PM GMT on a Friday will not be dispatched until the following Monday.

Please note that in some instances, orders for heavy items may take an extra day to arrive.

  Overseas deliveries
For overseas deliveries, please refer to the following estimated delivery times:

  • Europe: 3 - 5 working days
  • Rest of the world: 5 - 7 working days


A full refund or exchange will be given provided that the items have not been worn or used, and are returned to us within 30 days of purchase, together with all relative labels and packaging. You are responsible for the cost of returning items.

Please ensure that you include a copy of your invoice, along with an explanation of why you have returned your goods. If you wish to return your goods for any reason, please do so to the following address:

Woodlore Limited
PO Box 3
East Sussex
TN19 7ZE
United Kingdom

Product Reviews

The Jervenbag King Size - Mountain Camo is rated 5/5 based on 5 customer reviews.

All of our product reviews are from customers with verified purchases.

Overall Rating:


  1 of 5

  Excellent piece of kit, I recently used it on a 4 day trip and primarily as a sleeping bag. I was doubtful at first having heard about condensation and people saying their not breathable, But was extremely impressed. The primaloft lining (as used by the US military) provided a warm and comfy nights sleep, there was minimal condensation and it quickly dried out the next morning. I haven't used it in Winter conditions yet but would guess its about the same as a 3 season sleeping bag. I just wish i hadn't waited so long before buying one.  

  Neil Caseley
9th July, 2019

Rated: 5/5

  2 of 5

  The Jervenbag really is a great product keeping you warm and dry in all weather with many different shelter variations, hammock or bivi bag.  

  Derek Eade
20th February, 2017

Rated: 5/5

  3 of 5

  Really quality item. The mountain camouflage is amazing and works in many locations, not just up in the Scottish Highlands (or Norwegian hills). Using it as emergency shelter and sleeping bag cover. Yes, there is some condensation, but it is absorbed through the lining so doesn't make the sleeping bag wet. Just as they say, you need to air and dry it after use. Only downside is price and the zips were a little stiff. I applied silicon grease to the zips but you'd think for the price they could include that.  

  Philip Bagnall
3rd January, 2014

Rated: 4/5

  4 of 5

  I was concerned that this bag wouldn't be warm enough without a sleeping bag, but on my first night out in it (UK) it was so warm I was taking layers off and spent a really comfortable night just in this Jerven bag. It's also plenty big enough to have everything warm and dry inside with you (and I'm a big bloke) and in the morning I was up and gone in no time. Fantastic.  

  Ian Boys
16th May, 2013

Rated: 5/5

  5 of 5

  Fantastic piece of kit. The Graffalo didn't see me!!! Plus, it is really warm.  

  Luca Parrella
2nd October, 2012

Rated: 5/5

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