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Combining their knowledge of sleeping bag construction and high quality down, Mountain Equipment have given us a brilliant summer weight quilt, ideal for tarp camping and warm weather adventures. 
Combining their knowledge of sleeping bag construction and high quality down, Mountain Equipment have given us a brilliant summer weight quilt, ideal for tarp camping and warm weather adventures. 
Mountain Equipment

Mountain Equipment Helium Quilt Cosmos

£135.00  £150.00  10% off
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Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!


With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on the Undetermined

Mountain Equipment Helium Quilt Cosmos Information

Season : 2021W R

Brand : Mountain Equipment

Code : 001958.01286COS.Std

Light and completely unrestrictive, this summer weight quilt can be used for anything from tarp camping to travel and lightweight warm climate adventures. 

Inside the quilt is a 200g of high quality 700 fill power down, providing plenty of warmth in a small pack size. A higher quality down will pack up smaller and will perform better than a lower quality, meaning it can not only be taken camping but also can be used for lightweight summer weekends away where pack size is priority. 

Surrounding all this high quality down is Mountain Equipments own Helium 20 fabric. Weighing just 38g per metre squared, this extremely lightweight and packable fabric provides a soft feel next to skin whilst still maintaining the durability to last years of use. Not only is it lightweight and packable, but also so densly woven that Mountain Equipment have ensured no down can escape. This also provides a high level of wind resistance and resistance to heat loss. 

For an alternative to a sleeping bag which allows more movement, a smaller pack size and a more open experience while camping, walking or adventuring in warmer environments, the Helium Quilt will perform perfectly. 

  • Helium 20 outer shell
  • 200g of 700FP high quality down
  • Stitch through construction
  • Dual tether drawcords and snap closures at the top and bottom
  • Supplied with lightweight stuff-sack and storage cube   

How warm a sleeping bag do you really need? We’ve tried to help you by grouping our sleeping bags by their recognised comfort ratings. These are the ratings supplied by the brands that indicate the temperature at which you will remain comfortable whilst sleeping on an insulated sleep mat. After all, comfort is what you want when it’s cold and wet outside, and you’re all tucked up in your nice warm sleeping bag.

We always recommend that you choose your bag according to the coldest conditions you will experience; you can always unzip a bag if it is too warm, but trying to sleep when you’re too cold is just miserable. Bear in mind that we are all individuals, so we all feel the cold differently and that our own resistance will fluctuate depending on a whole load of factors, including how much we have eaten, whether we have consumed alcohol, whether we need a wee or what kind of mood we are in!

Sleeping bags do not generate heat; they only trap the heat we produce, so it is vital that you get into your bag when you are giving off warmth, don’t go to bed when you are cold, have a hot meal or a hot drink or do some brisk exercise to get you nicely warmed up.

Traditionally sleeping bag manufacturers provided their own temperature ratings based on their experience, the product's intended end-use and the perceived environment. However, each brand tested their bags in different ways, and it was hard to find a fair comparison between models. So, in 2005 a European standard for sleeping bag temperature ratings, EN 13537, was introduced to give consumers a comparable guide to sleeping bag performance across a range of brands and models. The ratings have four different temperature ratings to give you an indication of the bag's performance.

Comfort Rating: This is the temperature at which an average female should experience a comfortable night’s sleep. On average, women sleep colder than men, so this rating is some degrees above the "comfort lower limit" for a man.

Comfort Limit Rating: This is the lowest temperature at which an average male should experience a comfortable night’s sleep whilst laid down in a curled up position.

Extreme: This is a survival rating where the user is likely to suffer health damage such as Hypothermia. It should be treated with the utmost caution and not be relied on for general use.

However, the EN 13537 European Standard does not apply to down-filled sleeping bags with a fill weight of more than 800g; for those bags, you will have to rely on the manufacturer's experience and technical expertise, which is often more accurate!

Most reputable brands still use their own rating system alongside EN 13537, for instance, Mountain Equipment's “Good Night’s Sleep” and Rab’s “Sleep Limit”. These ratings are often the most accurate guide to the overall performance of a sleeping bag being used by an average outdoor enthusiast because they are based on years of expedition heritage, field trials, technological experience, and constant feedback.

But please bear in mind that all ratings are only a guide and, as mentioned earlier, there are a huge range of factors that can affect your comfort; if you are just not sure, it is always wise to go for a warmer model.

The biggest difference you can make to your overall comfort is to use an efficiently insulated sleeping mat. Once you get inside your sleeping bag, you instantly compress all the filling beneath you, greatly reducing its efficiency. Therefore using a quality sleep mat will ensure you are properly insulated from the cold ground, and you will be a lot more comfortable... Basically, there is no point in buying a top-quality sleeping bag if you are just going to lie down on the floor.

Technical Information

Fill weight: 200g

Total Weight: 510g

Pack size: 24cm x 11cm x 10cm

Good nights sleep rating: 5°C/40°F

Sizing Information

Click here for the manufactures size charts.

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4.5 As rated by 4 Customers

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  • Mountain Equipment Helium Quilt Cosmos Review by Manuela ,  On 17/04/2017 14:16:27

    This is light and looks good quality, however I bought it thinking this quilt could be converted to a sleeping bag closing a zipper along the side (as other quilt/bags do). This is not the case. There are just two snaps on the top and bottom, so effectively this is just a quilt that can be folded but not closed. Perhaps that was clearly indicated somewhere and I missed the information but I am returning the product because I need something that can be both a bag and a quilt (with a zipper that allows closing and opening). It is too bad that the company did not include a zipper (surely that would not bee too complicated?) as otherwise this product looked great and I think would be much more useful. Service from Trekitt was great and returning the product seems straight forward too
  • Mountain Equipment Helium Quilt Cosmos Review by Glen,  On 01/07/2018 21:25:36

    Super light and small pack size, this is an amazing Quilt. It lets a nice draft in the side, so is great for summer, and letting cool air in. Also going to be great to combine with sleeping bag in cold winter ahead. Great product, and great by price Trekitt
  • Mountain Equipment Helium Quilt Cosmos Review by David,  On 24/07/2018 08:30:06

    Its Excellent. I have never done the zip on a sleeping bag up as I run hot and am a fidget. The quilt stuff down in to its really small prefectly sized pouch (not rock tight). Enabled me to use a 35l pack for 5 nights backpacking on South west path. Was plenty warm enough for summer. Could be used to top up a bag to spec winter. All in all excellent.
  • Mountain Equipment Helium Quilt Cosmos Review by Kris,  On 27/07/2018 23:01:13

    Ive done a range of camping from solo overnighters to full on glamping but have always found sleeping bags to restrictive. I decided to take the plunge and get this and I wish Id done it sooner. Any concerns I had about falling out from it or it being too warm or too cold have been addressed. This last week has had its fair share of mild and warm nights. The quilt just seemed to stay in place, it seems wide enough and I thought if I needed to Id tuck one edge under my pad. For reference Im 6ft and it fits perfectly. Ive only tied the bottom when it got cold but it kept my feet warm. Paired with a decent pad Id highly recommend this for any season especially if you are layering up in colder conditions and still find sleeping bags too claustrophobic. Really does pack up small and the service from trekitt was spot on.
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