There are a host of options out there, ranging from very basic (and non-breathable) survival bags to all singing, all dancing, mosquito-net and poles options that verge on being mini tents. But I prefer to keep things simple. For that there’s great value British brand Alpkit. The price may be high, but this sleeping bag really does do it all. For a start it’s warm – the comfort rating allows three-season use comfortably and there are other versions for both lower and warmer temperatures available. They aren't typically more expensive than single sleeping bags and should work just as well, although if you're camping in cold conditions, you'll likely find that double sleeping bags let out more heat. Sleeping bags with synthetic fillings are generally machine washable, but if you don't own a washing machine with a large drum then you may need to take it to a launderette. Feather-filled sleeping bags can only be dry cleaned.

We roll up and stuff each sleeping bag into its carry bag several times, noting how much effort is required to complete the task and how easily the sleeping bag fits into the carry bag it comes with. Temperature retention We buy every sleeping bag we test rather than getting free samples from manufacturers, and each of our testers try out every sleeping bag in our selection. Comfort and ease of use A double sleeping bag is the answer. Most are bulky and compromise on good design, but Colorado-based Big Agnes has put the same thought and technology into their doubles as they do into their singles. This not only means a warm option (though note this is their own temperature rating system and refers to the comfort ‘limit’ rather than the comfort rating which is likely to be at least five or so degrees higher), but also one with great design quirks too.

Double sleeping bags appeal to couples and to those who like to have plenty of wriggle room when they sleep.

I’m often asked about bivvy bags. These are to be used in conjunction with a sleeping bag, not by themselves. It’s essentially a waterproof and breathable cover for a normal sleeping bag that allows you to happily sleep outside without the need for a tent. What sleeping bag do I need for camping in the UK? All the sleeping bags above are R (regular) but bags also come in S (short) or L (long). When looking at the advertised length of bag, make sure that the number refers to the ‘fits’ length (that is, the maximum height of the person that can fit inside it) rather than just the length of the entire bag.This is grams per square metre. It’s used to rate how much filling a synthetic sleeping bag contains and a good number is about 300+. You also have to take care to air your sleeping bag after washing it and hang it up evenly to prevent the filling from bunching up too much. Wringing it out should definitely be avoided as that's certain to spoil the even spread of the filling.

You’ll see impressively low temperatures for ‘Extreme’ but this just means it’s the absolute coldest condition under which this bag will save you from getting hypothermia. Rectangular sleeping bags are great if you only intend to sleep in warmer weather or if you like to feel unrestricted. They also offer the option of opening the bag out to form a quilt.Mummy - these are designed to fit more snugly than a rectangle and are tapered towards the foot. This reduces air movement around your body and helps to build up an insulating layer of warm air. The shape can be restrictive, so you may find them uncomfortable if you move around in your sleep. Sleeping bags can be a pain to clean, so we take note of any cleaning instructions that come with each sleeping bag we test, and wash them according to those instructions where possible. We praise sleeping bags that are easy to clean and don't suffer damage from washing, and penalise those that are a hassle or have loose threads after being washed.

I’ve spent over 15 years wild camping on mountain tops, suspended from cliffs and inside glaciers – and yet I always sleep more soundly than I ever manage to at home in my own bed. Perhaps it’s because all the manmade sounds are replaced with leaves blowing in the wind, the hoot of an owl, or the rhythmic ripple of a stream. Perhaps because I’ve dedicated so much time to finding the best sleeping bag.A super-comfortable and spacious double sleeping bag designed for comfortable camping nights for couples and those who like extra room to spread out.