4 Season Sleeping Bags - Winter & Cold Weather Camping
For nights that would end a trip in the wrong bag. A 4 season bag is built for winter camping, frozen ground, exposed pitches and cold-weather field use, where the margin between comfortable and dangerous is genuinely narrow. More fill, a proper hood, a draft collar and a zip baffle are what separate these from a 3 season bag.
Snugpak covers the military and expedition end with the Softie Elite 4, Tactical 4 and Sleeper Extreme, built on the Softie insulation the brand is known for. Sierra Designs brings the backpacking side with the Cloud and Nitro ranges in men's and women's cuts, and Kelty covers camping and family use with the Cosmic, Supernova, Wayback and Tru.Comfort Doublewide bags.
What you'll find in this collection
- Winter mummy bags with insulated hoods, draft collars and zip baffles
- Military and expedition bags built for extended field use
- Down and synthetic fills
- Women's specific bags with additional insulation
- Doubles for cold-weather couples camping
In winter the mat is not optional and it is not a place to save weight. Ground conduction is where the heat goes, so check the R-value of your sleeping mat, and consider a liner for the coldest nights. If you are sleeping under a tarp or in a bivvy rather than a tent, see tarps and bashas.
Ideal for
Winter Camping • Cold-Weather Field Use & Exercise • Mountain & Altitude • Bothy & Bivvy • Cold Sleepers • Year-Round Use
Related collections
Only camping in the warmer months? See 3 Season Sleeping Bags. The full range is in Sleeping Bags, with more in Sleeping Mats & Pillows and Tents & Shelters.
Frequently Asked Questions
Do I need a 4 season bag in the UK?
If you camp in winter, at altitude, or on exposed ground, yes. If you sleep cold, a 4 season bag used year-round with the zip open in summer is a reasonable approach and often cheaper than owning two. For spring to autumn only, 3 season is enough.
Can a 4 season bag be too warm?
Yes. Overheating means sweating, and damp insulation loses loft and warmth. Most of these bags have a two-way zip so you can vent from the foot, which handles a mild night without cooking you.
What else do I need for winter camping?
A mat with a high R-value, above all. Then a dry route for the bag itself, a hat, and something to eat before you get in. Getting into a cold bag already cold is the usual reason people have a bad night.
How should I store a winter bag?
Loose, in the large cotton or mesh sack that comes with it, never compressed in its stuff sack. Long-term compression flattens the fill permanently and is the fastest way to lose the warmth you paid for.
