A sleeping bag is a protective "bag" for a person to sleep in, essentially a blanket that can be closed with a zipper or similar means, and functions as a bed in situations where a bed is unavailable (e.g. when camping, hiking, hill walking or climbing). Its primary purpose is to provide warmth and thermal insulation. It also protects, to some extent, against wind chill, precipitation, and exposure to view, but a tent performs those functions better. The bottom surface also provides some cushioning, but a sleeping pad is usually used in addition for that purpose. A bivouac sack (bivy) is a waterproof cover for a sleeping bag that may be used in place of a tent for lightweight travelers or as a backup if inclement weather occurs.
Read more about Sleeping Bag: History, Design Types, Fill, Temperature Ratings, Indoor Sleeping Bags, Infant Use
Famous quotes containing the words sleeping and/or bag:
“When I think of him, and his six sons, and his son-in-law, not to enumerate the others, enlisted for this fight, proceeding coolly, reverently, humanely to work, for months if not years, sleeping and waking upon it, summering and wintering the thought, without expecting any reward but a good conscience, while almost all America stood ranked on the other side,—I say again that it affects me as a sublime spectacle.”
—Henry David Thoreau (1817–1862)
“I couldn’t find the spot where Frank had hidden the bag with the clothes. You can’t imagine how cold I was until I found them. You know, I’m beginning to understand why ghosts moan so in this sort of weather.”
—Lester Cole (1904–1985)