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The time has come for camping and you want to buy a new sleeping bag to replace the rectangular cotton sack you’ve been luggin’ around all these years. For starters, good move! There are lots of options out there for a great replacement that will actually keep you warm and dry as you enjoy the outdoors. There are also a lot of factors that go into buying the sleeping bag that’s best for you. Let’s try to get through those factors in an organized manner…

First, ask yourself what kind of camping you plan to do. The best bag for you will be different if you are car camping than if you are backpacking or mountaineering. The two main reasons for this difference are weight and what kind of insulation the sleeping bag has. It doesn’t really matter how heavy your sleeping bag is if you are just throwing it in the back of your car and driving off into the sunset. But if you are planning on carrying your sleeping bag on your back, you will definitely care how much it weighs.

The type of insulating material that the sleeping bag has will be the other big factor in deciding the right bag for you. The two categories you must choose from are down or synthetic insulation. Down-filled bags use goose feathers and down as the insulation to keep you warm. Synthetic-filled bags use a polyester synthetic insulation to fend off the cold. There are, of course, advantages and disadvantages to both options. Here we go…

Down:
* Down bags are more compressible than synthetic bags. This means that you can stuff your sleeping bag into a smaller stuff sack with a down bag, making it easier to fit in your pack.
* Down has a better warmth to weight ratio than synthetic insulation. A down sleeping bag that weighs less than a similar synthetic sleeping bag will keep you warmer.
* Down is more durable than synthetic insulation. Properly cared for, a down sleeping bag will last you longer than a synthetic one.
* Down is snuggly.
* Down has a wider range of temperature comfort. It breathes more than synthetic insulation, allowing you to remain comfortable across a greater range of temperatures.
* Down will not insulate once it becomes wet. Just think about a soggy sleeping bag for a second…
* Down sleeping bags are more expensive than their synthetic counterparts.

Synthetic
* Synthetic sleeping bags are the only ones that can keep you warm if, by chance, it gets wet. If you are camping in the Pacific Northwest, sleeping in a snow cave, or waking up in a field covered in dew, this is a serious consideration. A soggy synthetic sleeping bag will be just as unpleasant as a soggy down bag, but it will dry much faster.
* Synthetic bags are less expensive than down ones.
* Synthetic bags are less compressible than down bags. If space is an issue for you, keep this in mind. If your sleeping bag takes up your entire backpack, where will your can of Alaskan salmon go?

There are some other factors that go into distinguishing one sleeping bag from another. How tall are you? Sleeping bags typically come in lengths, and you should consider the options. If you are in between the sizes offered, think about the larger size. There are, of course, arguments for and against this decision. If you are too short for your bag, you won’t be as warm as you could be. Think about all that air floating around your sleeping bag. The time it takes to warm that extra air could be the time that you are sleeping nice and toasty. On the other hand, if you are too tall for your bag, you will also compromise your bag’s warmth. If your feet are pushing against the end of the sleeping bag, you are compressing the air out of all of that nice insulation down there. This is the same insulation that needs air to loft it up so that it can trap heat and warm you efficiently. Check out the bag’s specs to find the lengths that are offered, and make your decision accordingly. Some companies make women-specific sleeping bags, which are typically shorter than unisex bags.

Some other things to think about when buying a sleeping bag include:

Zipper length - some sleeping bags come with a zipper that only zips down half of the bag. Great for weight concerns, not so great if you like to fully unzip your bag.
Right or left zipper – seems like a minor detail, but if you want to zip two sleeping bags together, you need compatible zippers, one left hand side and one right hand side. Also, some people have personal preferences to right or left handed zippers.

Shell material – some sleeping bags are made with waterproof or water resistant shell materials. This is a good thing to think about if you are planning on bivying or sleeping without a traditional tent.

Sleeping pad/pillow sleeve – if you roll around in your sleep a lot, you may want to look for a sleeping bag with a sleeping pad sleeve. You slip your sleeping pad right on in, and voila! You never roll off your comfy pad. Pillow sleeves are an option to look for if you want to stuff extra clothes in and comfort your noggin while you drift off to sleep.

Have fun looking at all the great sleeping bag options and planning your future adventures!