Temperature rankings are quite crucial items of details to consider when picking a bag. And although mummy and also rectangle-shaped resting bags can cover a wide range of temperature levels, mummy bags are the common designs for the extreme polar temps such as those you would locate in the Andes.
Rectangle-shaped shaped bags are one of the most popular and also most acquainted. These supply you with even more space for movement within, lowering that claustrophobic feel to some degree. Since they are of a square form they could also be whized to a 2nd to generate a double sized resting bag, huge enough for two individuals to sleep in. Or, if you completely do not like the feeling of being zipped up, you can leave the bag unzipped completely and also utilize it as a blanket rather. These bags are typically rather huge, and also might not be perfect for treking trips as they can be instead bulky and unpleasant to carry.
It is very important to bear in mind though that the temperature rankings are overviews for recommendation only. Because, much like spicy food, consuming a jalapeno pepper for some isn't really a big deal ... but for others eating one would certainly seem like it would melt the skin straight off their tongue. The exact same goes with a sleeping bag. A +20 level rating would indicate that for most the bag would certainly be cozy sufficient. The most effective way to pick a cozy enough bag is to go with one that handles a 10 degree chillier weather condition than what you're anticipating to be sleeping in. Selecting in that manner needs to have you ... covered. (No pun planned.) And once more of course, appropriate sleep wear should fit the chillier or warmer demands you may have.