Rectangular shaped bags are the most popular and most familiar. These provide you with more room for movement within, reducing that claustrophobic feel to some degree. Because they are of a square shape they can also be zipped to a second to produce a double sized sleeping bag, large enough for two people to sleep in. Or, if you completely dislike the feel of being zipped up, you can leave the bag unzipped entirely and use it as a blanket instead. However, these bags are often fairly big, and may not be ideal for hiking trips as they can be rather bulky and awkward to carry.
The other sacrifice is the size or bulkiness of the bag. A mummy sleeping bag for the most part will be much smaller for carrying around which is why it is a preference for many backpackers/hikers. The rectangular sleeping bag isn't as small but since it's not typical to be carrying it, other than somewhere in a vehicle while getting to your intended destination, the bulkiness of the bag is not as big an issue.
If you see a +20 degree rating that would mean that the bag should be warm enough for temperatures that are 20 degrees or warmer. And if you see a - 20 degree rating then it has been determined that the bag should be warm enough for minus 20 degree weather.
Sleeping Bag Wednesday , April 04th , 2018 - 21:01:08 PM
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