While most lightweight sleeping bags are filled with gram-shaving down, Montane's Prism uses special synthetic insulation called Primaloft, and though slightly heavier, it's resistant to the wet - so you won't get cold if the material gets damp for any reason. It'll keep you warm at around the 5C mark and weighs just 1.2kg, making it great for spring or summer backpacking missions.
£150 | Montane
This three-season sleeping bag is rated to a cool -9C, allowing you to feel comfortably warm even when the mercury drops during Spring or Autumn. Its 750+ goose down filling means it can be packed down to just 7x12 inches and weighs in at just 890g - perfect for backpackers. The best part of the Antares is the built-in SynergyLink Connectors, which allows you to strap one of its lightweight matresses to it, meaning you can sleep comfortably without falling onto a cold ground during the night.
£270 | Cascade Designs
Mountain Equipment Matrix III
The Matrix is Mountain Equipment's 'extreme' mountaineering range, making it ideal for those who require a lower weight in their backpack. The Matrix III is the one to go for if it's going to be cold – it'll keep you comfortably warm even when it's approaching freezing temperatures outside, and it'll stay that way even if the rain rears its ugly head, thanks to a brilliant hybrid combination of water-resistant 725 fill down on the upper and Primaloft Synergy insulation on the underside (where it's most likely to get damp). It weighs just under 1.3 kilos and packs down to a reasonable 21cm x 31cm.
£290 | Mountain Equipment
OMM Mountain Raid 1.0
OMM first became famous for their super-lightweight running clothes for mountain marathons, and now they have a sleeping bag to match this two day event. At 380g, the Mountain Raid is probably one of the lightest bags you'll ever slip into and it packs down to the size of a bag of sugar, so it's ideal for adventurers who want the lightest backpack around. It's laden with Primaloft One synthetic insulation and a water-repellent outer fabric, so wet weather shouldn't be an issue. The level of Primaloft fill is fairly low, so this is better suited to a warmer spring or summer season.
£145 | OMM
Coleman Hudson Double
If you're sharing your sleeping space with your significant other, you may be interested in investing in a double sleeping bag. Why? Well, it's kind of romantic and it actually keeps you warmer on cold nights as you share body heat. Coleman's Hudson Double is possibly the pinnacle of double bags, thanks to its luxurious cotton flannel lining and Coletherm insulation which will keep you warm above 7C. The hood helps to retain heat, while built-in pillow pockets help to keep your pillows in place during the night.
£49 | Coleman
Rab Expedition 1200
Going somewhere cold this year? If you're going to be sleeping in temperatures below freezing, then you need a seriously specialist kind of sleeping bag. The Expedition 1200 is Rab's Arctic-spec number, with 850 fill power European goose down insulation to keep you toasty even when the chill gets serious, as well as Pertex fabrics inside and out to keep water and wind from finding its way into your box. It's even big enough to allow you to wear down clothing, for extra warmth. Basically, if you get cold in this sleeping bag then you should probably sleep in a sauna.
£650 | Rab
If you're a tall bloke, you might find that a lot of sleeping bags are a bit on the snug side, so it's a little ironic when outdoor expert Snugpak is offering extra long bags, like this Softie 15 Discovery, which has a 265cm exterior length option available. So even if you're over 7ft tall, this will do the job. The Softie 15 Discovery is also perfect for cold temperatures, offering a comfortable temperature rating of -15C, so even in near-Arctic conditions you can keep warm.
£160 | Snugpak
The North Face Cat's Meow
For a sleeping bag that could conceivably be used all year round, even when the temperatures plummet below freezing, the Cat's Meow from The North Face fits the bill. Its synthetic insulation is rated to a comfortable -1C, and it has loops that can be attached to a sleeping pad, so you won't fall out mid-slumber. The Cat's Meow comes in three different sizes, and even in the longest length it weighs a respectable 1.3kg and packs down to 25cm x 28cm.
£120 | The North Face