Mountain Raid 100



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TOG (DRY/WET) 3.0/2.2

The Mountain Raid uses the highest grade PrimaLoft® Gold with Cross Core synthetic insulation alongside incredibly strong yet light fabric to create the optimum sleep system for competitors and fast packers.

The minimalist bag for the purist. The shell is constructed from our own windproof PointZero fabric with DWR (Durable Water Repellancy) giving a good degree of water resistance when your pack takes a dunking en route to camp.

PrimaLoft® Gold with Cross Core provides the best warmth to weight ratio available on the market. We take this high quality insulation and map different weights per panel to ensure the best usage of the fill. The base sheet is filled with PrimaLoft® Cross-Core Gold 40g/m2, whilst the top layer, above the sleeper, is 60gm/2 (giving us the 100g/m2 total in the name). Mapping the insulation in this way allows us to achieve such a low pack weight, there is no point placing excess wadding (and therefore weight) beneath the sleeper, as the weight of their body will compress it and reduce its ability to trap air and insulate. Instead, we focus the warmth on the top sheet and leave it up to you to decide what mat to use to insulate you from the ground.

The footbox is shaped and filled with PrimaLoft® Cross-Core Gold (60g/m2) to keep the feet toasty warm.

The PointZero outer shell is loose laid, with the fill stitched through to the lining, to eliminate cold spots and keep the insulation stable.

PrimaLoft® Cross-Core Gold is made from 90% post consumer recycled content


Unlike down, synthetic fill retains its loft when wet. Down is still the best warmth to weight when dry but PrimaLoft® Gold with Cross Core technology is now a close second place and certainly preferable in wet conditions.


Inkeeping with minimal weight, Mountain Raid 100 has only a half zip, to allow venting and aid access. The zip is offset to the right so it can easily be reached when closed in.


OMM’s PointZero fabric is used for the inner and the outer. This super lightweight fabric protects from drafts in a vented tent and by using both inside and out, prevent air movement around the insulation fibres, which can cause shearing of the heat away from the body.


Thicker insulation top than base
for maximum efficency
Half YKK zip
DWR (Durable Water Repellancy)
90% PCR (Post Consumer Recycled content)
3.0/2.2 tog (dry/wet)
Stitched through inner with
loose laid outer
Mummy shape
Shaped footbox
Hood drawcord
Fast drying easy care
Hang loops at base
Length: 195cm
Shoulder Width: 65cm
Foot Width: 35cm
Pack Size: 19 x 12cm


Colour: Black/Orange
Fabric: PointZero (Nylon), PrimaLoft® Gold 40/60g/m2
Weight: 380g

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What's a Sleep System?

 A Sleep System normally just refers to a usually just a standard insulated sleeping bag but there are some other innovative ideas out there such as our own Rotor Sleep System that uses insulated trousers (that unzip to form a half sleeping bag) that then clip into our insulated jackets and the Foot Pod to complete it. So whilst not technically a sleeping *bag* it is an insulated sleep system!

What Temperature Rating Do Our Bags Get?

 Well…that’s a good question. Whilst we do use the EN tests for the bags, we do not believe these are the best measure of a bag’s performance. Instead we use Tog ratings for both dry & wet performance (very relevant when using them in the UK!). You can find a comparison table for our sleep system on each product page. For more information on Togs, check out the OMM Glossary. We do not assign a temperature rating to our bags as we believe the figures gained in a laboratory are not necessarily representative. Each person will have a different experience, depending on their size, what they have eaten, their metabolism, what sleeping mat they use and what they wear in the bag. Temperatures quoted from lab testing also do not take into account compression of the underside insulation when you are in the bag, which has a big impact on the true value.

Our Sleeping Bags are primarily designed as a race-weight option for our event held in the UK every October. This means competitors can experience anywhere from -5C (as they did in 2018) to plus 10C and often in wet conditions.

The emphasis here is race-weight, that is to say, users are willing to put up with a certain amount of discomfort for the space and weight saving.  

Can I Wash My Sleeping Bag

 Yes! And please do. Just like owning a top end sports car, a performance Sleep System is only as good as how well you care for it. In the same way a sports car still needs oil changes and screen wash, you need to regularly maintain your OMM Sleeping Bag to keep it performing at its best. It is important to follow the Product Care Instructions and use the correct wash  product as these can affect your Bag’s performance. The benefit of using a synthetic insulation is it is much more resilient when washing plus dries a lot quicker. 

What Is A Tog?

 The Tog is a measure of thermal insulance of a unit area, also known as thermal resistance. It is commonly used in the textile industry and often seen quoted for duvets and carpet underlay.
Developed at The Shirley Institute in Manchester, as an alternative to the SI unit of m2K/W.
Basic unit of Tog (insulation coefficient) is the RSI, (1m2⋅K/W). 1 tog = 0.1 RSI: Thermal resistance in togs is equal to 10x the temperature difference (in °C) between 2 surfaces of a material when the flow of heat is equal to one watt per m2. Tog is measured from the difference in temperature between a heated metal plate beneath a fabric and the air temperature above the fabric. This is a much more objective measure than Comfort Ratings, as commonly used for sleeping bags and can be applied to a wider variety of sleep systems. It is also possible to provide a Wet & Dry Tog value, useful when describing use in typical UK conditions.

What Insulation Do We Use?

OMM use PrimaLoft® synthetic insulation as it is widely regarded as the best quality available; with insulating properties very close to that of down plus largely manufactured from post-consumer recycled product (PCR). Usually manufactured in a roll or sheet of ‘wadding’, think loft insulation but a lot nicer! From PrimaLoft® we mainly use their Gold Eco with Cross – Core Technology, their highest rated and most sustainable option plus the latest ACTIVE fabric in the Core Ranges, built from a synthetic plume woven through a knitted mesh, CORE offers the warmth of a fleece but with less than half the weight.

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