Mummy sleeping bags are tapered at the legs and the head, following the natural contours of the shoulders and hips.
Pros: They usually pack down small and have an excellent warmth to weight ratio making them ideal for backpacking trips where their excellent efficiency gains them popularity.
Cons: May feel restrictive once you’re zipped in.
Rectangular/wide sleeping bags are squared at the bottom and top of the bag to aid comfort over performance.
Pros: They're usually a lot more versatile as they can often be opened as a duvet or zipped with another bag to create a double wide sleeping bag. They also have a little more room which makes the excellent for caravan trips and house guests.
Cons: They can be bulky to pack down and their warmth to weight ratio is often quite low.
Double wide sleeping bags are twice as wide providing ample space for two people.
Pros: They can be highly versatile for families and can usually be converted into two separate bags or blankets. Perfect for Mum and Dad on a family camping holiday.
Cons: They are usually bulky to pack and heavy with low warmth to weight ratio.
Some brands offer sleeping bags that have been designed specifically for women and children, as well as extra-long or extra-short bags to accommodate everyone.