The shape of the real resting bag is to personal preference. The general selections are the normal rectangular form, the conical form, or the mommy bag. Some individuals might not such as the feel of sleeping in a regular rectangular shaped bag, favoring the closeness of a tapered one, whereas others may really feel too claustrophobic.
Semi-Rectangular: I call this the cross. This backpacking bag is rectangle-shaped ahead and afterwards slenders along towards the feet. With this type, you obtain added space, but not as much weight as a true rectangular resting bag. For those who are claustrophobic, like me; we can reach sleep a little better inside a bag with added room in it and still have some benefit from the form.
Draft Tube/Draft Flap: This is a flap or tube that leaves side the zipper. This flap helps reduce warmth loss. When choosing a treking rest bag, validate that the flap is simply sewn on the cellular lining as well as not with the bag. Make certain you analyze the zipper prior to purchasing to verify that the flap/tube doesn't problem or get captured in the zipper course. Fill: There are two fundamental options of bag fills; Fabricated (polyester) and Down (shielding feathers of ducks or geese).