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How to Buy the Best Sleeping Bag

A good sleeping bag can make the difference between comfort and a long, miserable night. Follow these tips on choosing the right sleeping bag for your adventures.

KNOW YOUR BODY

If you are always wearing a T-shirt in camp when others are wearing a fleece — and you’re not cold — get a bag rated about 10 degrees lower than the lowest temperatures you encounter on trips. If you’re one
of the first people to put on an insulated jacket while hanging around camp, get a bag rated 20-25 degrees lower than the coldest nights you anticipate.

YOU CAN HARDLY BEAT THE PRICE of the COLEMAN SILVERTON 25 DEGREE MUMMY SLEEPING BAG ($69, coleman.com), but that’s just one great factor. Stuffed with synthetic insulation with offset quilt construction that eliminates cold spots — along with a draft tube, an adjustable hood and even a pillow pocket — this bag will keep many campers warm in temps around freezing and above. Sized for sleepers up to 6 feet, 2 inches, it has a spacious foot box and two-way zipper in case you need to ventilate from the top and bottom on mild nights. One downside: It’s heavy and bulky, better for car camping.

KNOW YOUR BUDGET

Prices vary depending on factors like type and quality of insulation, as well as materials used. For instance, a bag rated to zero degrees uses much more insulation than a 30-degree bag.

TEMPERATURE RATINGS

Sleeping bags usually are rated for the lowest temperature used. Many manufacturers use the EN or ISO rating system, a standardized measurement of warmth.

GEARING UP FOR YOUR FIRST CAMPING OR BACKPACKING TRIPS? The affordable and functional KELTY KIDS MISTRAL 30 ($50, kelty.com) is a great choice. The Cloudloft synthetic insulation will retain heat even if it gets damp, and the adjustable hood opening helps seal in heat. Plus, its weight and packability make it one of the most affordable bags that can cross over from car camping to backpacking.

SYNTHETIC VS. DOWN INSULATION

There are two main types of insulation: down and synthetic.

Down is generally warmer, lighter and more packable than synthetic insulation — especially higher-quality down (rated 800-fill and above). But it’s typically more expensive and loses its ability to keep you warm if it becomes wet. There is some water-resistant down.

Synthetic retains its ability to trap heat if the bag gets wet. These sleeping bags are usually heavier and less packable than down bags, but they are also less expensive. They’re the best choice for wet adventures.

THE DRAWBACK OF LOW-PRICED SYNTHETIC BAGS IS THEY CAN BE TOO HEAVY ND BULKY FOR BACKPACKING. Enter THE NORTH FACE ECO TRAIL SYNTHETIC 20 SLEEPING BAG ($129, thenorthface.com). At under 4 pounds (regular length) and packing down to 10-by-18 inches, this mummy bag is made for backpackers on a budget. Its EN limit rating of 20 degrees derives from recycled synthetic insulation — in fact, all materials that go into the bag are recycled, except for the zipper teeth. A wraparound J-zipper and extra width in the knees make it feel roomier than many mummy bags and expands options for ventilating. And it comes in unisex sizes ideal for Scouts nearing adulthood.

WEIGHT

This matters when you’re backpacking, but less so when car camping.

Lighter, higher-quality insulation costs more, but you can also reduce weight and bulk by not buying a 15-degree bag when you need only a 30-degree bag.

DON’T NEED EXTRA WARMTH OR THE WEIGHT AND COST THAT COME WITH IT? The ALPS MOUNTAINEERING AURA +35° ($100. alpsmountaineering.com), made for mild summer nights, weighs in under 3 pounds and packs down to 8 ½-by-16 ½ inches. The synthetic insulation is packaged within two-layer offset construction that eliminates cold spots and is buttressed by a zipper draft tube. Bonus: It comes with a compression stuff sack.

MUMMY VS. RECTANGULAR SHAPE

Mummy bags taper from head to foot for thermal efficiency (less space to heat up) and to minimize weight and bulk, but some can feel claustrophobic.

Rectangular bags are more spacious, but are generally heavier, bulkier and sometimes have cold spots.

Treat a bag like boots: Try it on before buying.

THE KELTY COSMIC DRIDOWN 20 ($160, kelty.com) isn’t the least expensive bag on this list, but it might be the best value. Built for three-season backpacking with an EN limit rating of 19 degrees, the Cosmic is generously stuffed with water-resistant 600-fill down, packs down to 8-by-15 ½ inches and weighs under 2 ½ pounds. The dual-slider zipper doesn’t snag, and the hood and draft collar keep warmth inside. It comes in three lengths, including a small for people up to 5 feet, 6 inches. Try finding a bag with all those features at this price.

CONSTRUCTION

Less expensive, yet lightweight, bags have sewn-through baffles, which can create cold spots along seams. Higher-quality horizontal baffles are typically warmer. Also look for a draft tube (along the zipper), collar (inside the hood) and no-snag zipper guard.

GEAR GUY’S ADVICE?

Get what you can afford. With an inexpensive bag, you can still get outdoors, which is what’s most important, right? If and when you have the dough for a nicer bag, it will make your wilderness adventures a little more luxurious.

CARING FOR YOUR BAG

Properly cared for, a sleeping bag can last 10-20 years. Body oils can compromise insulation, so to prolong your bag’s life, you should sleep in clean base layers. Air out your bag after each night of camping, but don’t leave it exposed to sunlight for long periods.

Post-trip, hang the bag to dry for a day or two, and then place it in a big storage sack or an old pillowcase. Be sure to store it in a dry place. If your bag gets really dirty or starts losing loft, follow the manufacturer instructions for washing it.

13 Comments on How to Buy the Best Sleeping Bag

  1. REI makes a good bag

  2. The other day i got a great deal on a mummy sleeping bag 😀

  3. if you might get wet, dont bring a down bag – it loses its warmth and dries really slowly. Use down when you’ll definitely be covered and make sure your bag is wrapped carefully when you are carrying it on your pack – in case it rains while you’re on your way to your destination! That said, down rules. Much lighter and smaller than synthetic.

    One neat idea is to buy a $40 silk down mummy bag liner. The thing adds 10 degrees to your existing bag and it means you can make a summer bag into a fall bag. The silk liner is only about as big as two teenagers fists and weights very little. It also keeps your bag cleaner as it is totally washable.

  4. We are new to camping out and have not purchased bags yet. In Fl where it is pretty much hot year round. What type of bag do you recommend? I am sure we are gonna get synthetic.

  5. Recently got a mummy bag after years of using rectangular bag. It’s light, warm, roomy, easy to pack, and I don’t like it. It gives me claustrophobia. First night in it I dreamt I was being swallowed by a python.

  6. Second Classman // September 28, 2009 at 6:28 pm // Reply

    i have a marmot 40 degree bag. great for summer campouts

  7. Yea, some sleeping bags are just freezing cold. I try to make
    mine more at a comfortable tempreture.

  8. pumpernickel // August 11, 2009 at 7:38 pm // Reply

    i have an ll bean bag (0degrees) its a mummy bag and is compressible and good all year

  9. You can use a small camp pillow in the hoods of most mummies, except for in exceptionally snug bags.

  10. Mummy sleeping bags are great for camping; however, mummy sleeping bags cannot accomodate a full size pillow like open end sleeping bags. Are travel size camping pillows available that are appropriate for use in mummy bags, or does a person need to hand make a custom camping pillow for use in a mummy sleeping bag for camping?

    • usually camp pillows come with a stuff sack and are about half the size of the kind we use at home. My mummy bag is rather large and i usually bring a regular pillow and turn it 90 degrees and it fits fine but you can buy small camping pillows too
      from a scout

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