Mammut – Montana 2 Sleeping Bag

Mammut have teamed up with UK retailer Go Outdoors to launch an exclusive range of sleeping bags and we were given a weekend in April to try out the baby of the bunch – the Montana 2 – before it was whisked off to Mammut HQ to be thrust back under the veil of secrecy until launch day.

We let sleeping dogs lie
We let sleeping dogs lie

The notice came in late on Thursday evening that the Montana 2 would be arriving for the weekend but we weren’t scheduled to go camping and that left us with a bit of a dilemma. How to test a sleeping bag for comfort if you’re not using it under canvas? Well, the answer came in a surprising set of ways.

I got the Montana 2 out of its bag when it arrived on Friday evening to give it the once over and let its insulation fluff back up to full potential. I left it on the living-room floor and went off to make some dinner. In my absence, Sam the Dog – who prides himself on being a bit of a comfort connoisseur – decided that the Montana 2 was far, far more comfortable than his nice expensive bed and he curled up on it and slept the entire evening away like a baby. Testament, no doubt, to the rather impressive insulation that Mammut have stuffed in to this bag.

That insulation is fully synthetic OTI Element , and branded with the Ajungilak logo, which celebrates the company which first made synthetic sleeping bags back in the 1950s and has since been bought by Mammut. The Montana 2 (2-season) is rated as per this photo:


A comfort level of 24C to 4C, with an extreme of -11c (if you didn’t already know this, women should ADD 5C to these ratings, and you should be wearing clothes for any of the extreme measurements).

mammut_montana2_5The Montana 2 was used for many hours of the weekend to sit, lie and generally mooch around in. What was surprising is just how roomy the design of the bag is. There’s enough space inside for you to easily put your hands on your hips, lie on your side, or sneak a family bag of walkers crisps in for a midnight snack.

It’s also a pretty good length (195cm), and you can see here that The Wife (5ft10) has ample room to grow in to, or to wear that silly bobble hat which she dearly loves to take camping all year round.

The bag is lined with a soft-touch material which doesn’t cling to your clothes and feels good against your skin. And the outer fabric is a shiny, scrunchy ripstop material which is breathable to let your night-time sweat out, but helps trap some warmth in the insulation.

Importantly for a spring-summer weight sleeping bag, the synthetic Montana 2 is machine washable at 60C – plenty hot enough to get rid of that post-festival stench, or the distinct whiff of a campfire before you tuck it up in the attic for winter.

The Montana bags are a mummy shape (narrower at the feet) which helps to keep your tootsies warm. They feature a really generously-sized foot box which is slightly off-rectangle in shape and allows for your feet to move around a bit. The zipper doesn’t go all the way to the feet, so if you like cold feet when you sleep then this may not be the bag for you.

Massive foot box with logo on it
Massive foot box with logo on it

There’s a couple of really nice touches to the Montana 2 sleeping bag. The main zipper pull has a little message on it which says “Sleep Well” (the dog certainly did) and the water-resistant (read “splash proof”) carrying bag has a sort of mountaineering snakes and ladders game printed on it for when you’re stuck in a tent and the weather is against you. Clever.

mammut_montana2-2On the note of that carrying bag – it’s a compression type sack which uncompressed measures 0.66% of a standard sized dog, as shown here. Compressed it goes down to a teeny weeny 5 Litres or so – we wouldn’t keep it that squished for long though.

The Montana 2 is a nice step up from basic sleeping bags. It’s rated for spring/summer but don’t think that means that it’s a compromise. It’s a well-featured bag which you can baton down the hatches on during colder summer nights.


SUMMARY: Although they’re available exclusively at Go Outdoors, the Montana range are definintely worth a look if you’re near a store and in need of a decent sleeping bag. They don’t scrimp on features or finish and will see you much more comfortable than a bog-standard bag from a mass-market retailer.

4-hammers Price:
 More: Go Outdoors