The classic sleeping bag in a rectangular shape. These sleeping bags feature a zip that be fully opened to turn the bag into a blanket. For many people, a rectangular bag is the most comfortable type because it gives your legs more freedom of movement. The disadvantage is that there’s more air to heat up inside the bag. Therefore, they weigh somewhat more than a comparably warm mummy bag and don’t pack down as small.
- The most comfortable shape
When to choose:
A rectangular bag is especially good for camping and trekking in moderate climates when the extra degree of comfort outweighs the extra weight and size.