Best Rectangular Sleeping Bags of 2022

The Big Agnes Lost Dog is a cold-oriented sleeping bag that withstands temperatures up to 15°F. It uses FireLine ECO synthetic insulation made from recycled polyester, and the innovative design includes several features for comfort. It has a Free Range hood that allows you to lift your head while keeping a snug fit around your face. The Free Range foot box is similar, giving you some wiggle room. An additional no-draft collar will keep the cold wind out. 

For convenience, a Flex Pad Sleeve can stretch over an insulated sleeping pad for extra warmth. The bag also has a 2-way anti-snag zipper and can be joined with another right-zip sleeping bag. If that doesn’t sound comfy enough, the Lost Dog offers a Pillow Barn feature that makes sure your pillow stays put all night. Although it is on the pricier end of affordable, the extra features make it worth it.

Even though a sleeping bag is expected to be a bit cramped and tight, to ensure maximum warmth potential is maintained, surely we can wish for a bag with a little bit of wiggle room too? Look no further than the REI Co-op Siesta 25 sleeping bag. This sleeping bag has enough components to meet any needs you may have, including a two-way main zipper, which allows you to unzip the bottom to let your feet have some air if it’s getting a bit too stuffy for your liking.

A shorter zipper on the other side of the bag allows you to fold down the top of the sleeping bag, giving you a bed-like feel. The polyester outside of the bag has been treated with a water resistant agent, so you don’t have to worry if your bag gets a bit damp on your camping trip.

The Sea to Summit Trailhead ThII 30 is another synthetic sleeping bag that retains its insulation abilities even when wet. It uses a unique WaveLoft technique that tangles filling fibers for maximum heat retention up to 30°F. This bag has a tapered rectangular shape, providing you with comfort and room to move. An oversized anti-snag zipper draft tube will guard your whole body against cold chills when you snuggle down in this bag. 

An important characteristic of the THII 30 is its versatility. Its full-length zipper lets you turn this sleeping bag into a quilt. Furthermore, there is a second zipper in the foot box, allowing ventilation for your feet and broad temperature adjustability. Plus, to prevent your frustration, the bag’s lining fabric is directly attached to the shell fabric, which prevents zipper tangles.  This sleeping bag is excellent for backpacking since it weighs about 2.5 lbs – not much more than most ultralight sleeping bags!

A great bag for any season, The North Face One Bag Sleeping Bag will keep you warm in just about any temperature you can imagine sleeping in down to 5° F. Although there is technically a down layer included in this 3-in-1 bag, we still think the synthetic outer layer makes this one of the best synthetic bag choices on the market today. 

This bag has easy-to-use zippers, so configuring the bags just the way you want them will be a breeze. For mild summer nights, you can opt to use only the super lightweight 40° F outer layer on its own. If there’s a chill in the air, you can pair the blue outer layer with the removable yellow mid-layer and stay warm down to 20°F. And if you’re an extreme camper who loves sleeping outside during the wintertime, then use all three bags for warmth in temperatures down to 5°F!

This is certainly the most versatile bag on the list and it’s very popular among both car campers and backpackers because it just about meets all your wilderness sleeping needs!

The Exped MegaSleep 25 Sleeping Bag is a versatile option for anyone who likes to camp or backpack.

Weighing in at about 2 ½ pounds, this bag isn’t too heavy for a pack, and won’t take up too much space either. The bag has zippers down both sides, so you can get in and out of it easily, and adjust the temperature easily according to your preference. 

This bag is a rectangle shape, so you will have plenty of room to spread out, no matter what your favorite sleeping position is. There is a draft tube along both zippers in this bag that will help prevent heat loss and keep you cocooned into your bag at night. 

Tested to keep you warm down to 25° F, this bag is a great option for spring, summer, or fall camping or backpacking.

The Sea to Summit Traverse TvII 25 has a tapered rectangular shape and uses the WaveLoft construction for increased comfort. However, the Traverse TVII 25 has a more expanded range of features. It can withstand temperatures as low as 25°F, allowing you to explore slightly colder environments. And an oversized, anti-snag zipper and a neck draft tube provide exceptional resistance to chilly mountain breezes. 

A Free Flow zipper system in this bag comes with three features that let you customize your temperature. A full-length main side zipper, a half-length opposite side zipper, and a foot zipper all provide you with unrestricted movement and ventilation. As a bonus, the TVII 25 can be zipped up with another bag. This versatility makes up for its higher price, delivering you your money’s worth.

The North Face Dolomite One Duo is a 3-in-1 layering system that is great for couples who plan to camp in a variety of seasons. 

The Dolomite One Duo uses a top layer and mid layer that lets you stack and interchange the two to give you warmth over a wide range of temperatures. The top layer has a 50°F warmth rating and the mid layer has a 30°F warmth rating. When the two layers are paired together you get a 15°F bag. The zippering system lets you have three separate layers, which is nice if you tend to over heat on warm nights or want to use one layer as a blanket around the campfire. It has a roomy, rectangular shape that gives couples plenty of room to move around. 

While this is one of the best 3-in-1 systems we’ve come across, it does have some downsides. The Dolomite One Duo does a bit of everything but doesn’t excel at one category. While it’s not the lightest, warmest, or cheapest two person bag, it is a great option for couples who want a versatile sleep set up they can use while camping and backpacking as well as car camping and RVing.  

This bag is also available in a one person version.

The Nemo Forte 35 is an affordable synthetic sleeping bag that has plenty of room for those who love to sprawl out. This bag is a great option for mild weather adventures where you don’t have to travel too far to get to your campsite. 

What we love the most about this bag is its spacious dimensions. If you’ve ever felt trapped in a narrow mummy bag, you’ll love the Forte’s hourglass shape that is wider at the shoulders and feet and slightly tapered at the hips. This design is perfect for side sleepers or people who tend to move around a lot at night. We also loved what NEMO calls thermo gills, they are zips that let the insulation spread apart which is great for warm summer nights.

The biggest drawback of this bag is its weight and pack size. At 2lbs 2 oz, it’s not the best choice for long distance backpacking but is manageable for overnight trips. The Forte uses Primaloft synthetic insulation which has its pros and cons. It doesn’t pack down as small as down but it is far more affordable.

If you love the idea of this bag but wish it had down insulation, check out the Nemo Disco line. 

This sleeping bag also comes in a 20 degree version.

The Nemo Forte also comes in a women’s specific version in both 20 degree and 35 degree versions.  

The Big Agnes King Solomon 15 is a roomy doublewide sleeping bag that is perfect for couples who are tired of zipping two bags together. 

What we love the most about this bag is how warm and cozy it is. Big Agnes claims it’s like your own bed in the backcountry and we have to agree. We also appreciated the well thought out design of the King Solomon 15. It has vertical baffles that help keep the insulation in place instead of bulking up on one side. It also has a pad sleeve on the bottom to prevent your sleeping pads from slipping out from underneath you and your partner in the middle of the night. 

One of the downsides to an extra spacious bag like this one is it tends to trap a lot of dead air making it not as warm as a snug bag. If you tend to get cold at night, consider adding a thermal liner. Another nitpick with this bag doesn’t work well with narrow sleeping pads, so if you decide to go for the King Solomon, you might want to consider getting a double pad as well. 

If you’re looking for a summer double sleeping bag, check out the Big Agnes Sentinel 30. It has a lot of the same features as the King Solomon but isn’t as toasty. 

The Klymit KSB Double is a two person three season sleeping bag that is a great choice for couples who like to cuddle. 

What we liked the most about the KSB double is it’s two-part system that lets you fully unzip the bag to create a comforter. We found this really handy for warmer nights and car camping. The top layer uses a 650 fill duck down and bottom uses synthetic insulation. This helps cut the overall cost of the bag, but does make it slightly more heavy and bulkier. We appreciated the individual draft covers and hoods, which let us control how much ventilation we wanted. There are two zippers, one on each side so you don’t have to bother your partner when you want to get in or out of the bag.

The KSB Double is rated to 30 degrees, but it might not live up to that rating for all sleepers, especially women. This is a common issue with double sleeping bags because they aren’t nearly as warm as a single mummy style bag. Unless your partner is as warm as an electric blanket, you might want to bring a thermal liner for camping on chilly nights. When it comes to price, the KSB Double is a bit more expensive than similar double bags out there. It’s also quite heavy, weighing in at 4 pounds, 11 ounces, which makes this bag best suited for shorter adventures, car camping or mule assisted trekking.