c**y
发帖数: 377 | 1 Sleeping bags keep you warm by trapping and holding a layer of "dead"
(non-circulating) air next to your body. This air, which is warmed by your
body heat, forms a barrier between you and colder air or cold surfaces.
When evaluating bags, consider these key factors:
Comfort rating
Insulation (down or synthetic fill)
Weight
Size when compacted
Shape
Personal sleeping tendencies (are you, for example, a "cold sleeper"?) |
|
