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Mountain Ghost 300 is well suited to 3 season use where you need the practicality and reassurance of a synthetic bag. Packing down small enough to carry, it is a great choice for summer backpacking, DofE expeditions, river touring or cycle touring.

When you can’t always be sure that you will be able to keep your kit dry synthetic fill sleeping bags offer a degree of reassurance that you just don’t get with standard down bags. Mountain Ghost 300 is filled with Primaloft Silver insulation which hates water, so unlike down sleeping bags they maintain some of their insulating ability when damp. This will give you greater comfort in sustained damp conditions and it will dry more quickly.

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Constructed from a soft ripstop polyester that will feel soft against your skin and more comfortable the nylon in warm weather.

The full length YKK zip is protected by a baffle with an antisnag strip. The simple stitch-thru construction and roomy chest girth make it a very practical bag for year-round use in all but the harshest weathers.


Primaloft Silver insulation is a synthetic fibre which create millions of tiny air pockets to trap body heat. It uses water-repellent finish to improve performance in extreme conditions, maintaining its thermal properties even when wet. It’s also easy to care for, packable, breathable, and super soft: mega!

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Key Features

  • 3 season sleeping bag for year round use in all but harshest weathers
  • Primaloft Silver synthetic insulation retains thermal properties when wet
  • Adjustable head closure and insulated neck baffle for snugness
  • Internal pocket for valuables
  • C6 DWR to keep the moisture at bay
  • Low-maintenance synthetic insulation
  • 3 Year Alpine Bond

Vital stats

Temperature Ratings

AK Sleep Limit: -5°C
Our recommended usable limit of the bag. The majority of our customers will find this to be the tipping point between a comfortable and restless nights sleep.

TOG Leeds Comfort EN13537 Comfort EN13537 Limit EN13537 Extreme*
9.5 -5.5°C -0.5°C -6.5°C -23°C

* The Extreme rating is the temperature at which the average woman can remain for six hours without risk of DEATH from hypothermia - but can still sustain cold injuries - under EN13537 conditions. We do not recommend using this bag in these weather conditions, or making your purchasing decision based on this value.


Fill: 300g/m2 Primaloft Silver synthetic insulation
Inner: 240T ripstop polyester
Outer: 240T ripstop polyester
Construction: Stitch-thru


Weight: 1380g
​Internal length: 185cm
​Internal width: 64cm
Zip length: 160cm
Packed size: ⌀24 x 36cm
Compressed size: ⌀27 x 22cm

Origin: China


The Details