Best Sleeping Bags for Car Camping

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The most important spec on any sleeping bag is its temperature rating, which estimates the lowest temperature at which the bag keeps an average sleeper warm. Choose a rating with some margin below the coldest night you expect, because ratings assume you also have a sleeping pad and it is easier to vent a warm bag than to add heat to a cold one. For car camping, packed size matters far less than it does for backpacking, so you can favor comfort over compactness. That freedom makes rectangular bags appealing, since they give more room to move and roll than a fitted mummy bag, though a mummy shape traps heat more efficiently and suits colder trips. Fill type shapes both warmth and price, because down fill offers excellent warmth for its weight and packs small but costs more and struggles when wet, while synthetic fill is cheaper, keeps insulating when damp, and is the practical pick for humid or rainy conditions where the extra bulk does not hurt you in the car. Look at the shell fabric, the zipper quality, and whether the bag has a draft tube behind the zipper to block cold air. Some rectangular bags unzip fully into a blanket or pair together into a double, which is handy for couples. Length and width should fit your body since a bag that is too roomy leaves cold pockets. Basic bags start around 30 dollars, comfortable three-season models run 60 to 130 dollars, and premium down bags climb above 200 dollars. Start with the temperature rating, then choose shape and fill for how and where you camp.