Rectangular sleeping bags are the initial and also most typical form you'll see on the market. I directly don't think there is much of a visible difference in between the fillings nonetheless synthetic fibers will certainly not soak up water and will certainly keep you warmer also if the bag is a little bit wet. A damp down resting bag is very hard to dry out as well as is taken into consideration even worse than having no sleeping bag at all.
Remember that with time, from typical use, a treking sleeping bag will certainly lose its warming performance. This results from the fill obtaining a bit much more compressed. This will cause the "air pockets" to go away.
Primarily the term resting bag basically implies a protective bag for somebody to sleep in. A wet down sleeping bag is very hard to dry out as well as is considered even worse than having no resting bag at all. One more kind of resting bag is the mommy bag. Unless you are intending a trip to an extremely chilly climate and also resting outdoors after that you will most likely be better with rectangle-shaped sleeping bags over a mommy style bag. These bags have a particular usage and they are really certain, extremely cold climate, mommy sleeping bag.