Square sleeping bags might look a little retro, but for people who don't like the confines of a 'mummy' shaped sleeping bag, these are the ideal alternative.
The square, or rectangular shape means they give you a little more room to move, but it also means that they can be unzipped and used as a cover. This type of sleeping bag comes in single or double sleeping bag styles for those that want to snuggle up on a cold night, or even if you're looking for a little more space to move.