The tent body or canopy should be breathable, with numerous venting options. The fly is the weatherproof barrier, and is made of a coated fabric such as polyester. There are many tent designs and variations, but most fall into the category of dome tent or hoop tent. Dome tents, supported by crossing aluminum poles, are freestanding, roomy and stable in wind. Goose down and synthetic fibers are the two types of insulation used in sleeping bags.
Synthetic insulation is therefore a good choice for wet climates or for winter use.
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