Best Ultralight Sleeping Bag in 2023

Klymit KSB 20°F Sleeping Bag

The Klymit KSB 20°F mummy sleeping bag is an excellent option if you want something that will keep you warm on those colder nights but won’t weigh you down during the day.

Its 650 white duck down fill power is serious stuff – you’ll be nice and toasty even at 20°F! On top of that, you also get a draft collar to keep in that precious warm air and a hood to keep your head warm, yet it weighs in at just 2.75 lbs. This is a great warmth to weight ratio.

So, if things get a little too cosy in there, the ¾ zip has zippers at both ends for ventilation, but there’s a guard running the whole length of it so you won’t lose any heat unless you want to. It’s also an extremely comfortable sleeping bag, thanks to its down padding and soft nylon inner lining.

As well as this, its spacious foot box means you can relax your ankles after a hard day of hiking, and the expanded chest area and general flexibility of the bag mean you’ll have room to manoeuvre yourself into your favourite position – you’ll even have space to slip on an extra layer at night, although you probably won’t need it. This bag is durable too and features anti-rip nylon as well as a durable water repellent outer layer.

Handy extra features include length locks, so the backpacking sleeping bag can be adjusted to suit smaller folk, and a stash pocket in the draft collar so you can keep your essentials close at hand. Not only does it come with a stuff sack that compresses a bag, but also a regular sack so you don’t have to compress the bag at all times – something that helps your bag stay nicer for longer.

It might not be a super cheap option, but you get a lot of high-end features without the biggest price tags. It also comes with a warranty for that extra peace of mind over your investment. One drawback is that this bag compresses to 13″ x 8.5″, which is a little larger than some of the other models out there.

Therm-a-Rest Questar 20-Degree Lightweight Down Mummy Sleeping Bag

At the high-end of the ultralight sleeping bag spectrum, we have the Therm-a-Rest Questar 20-Degree Lightweight Down Mummy Sleeping Bag.

You certainly won’t be shivering at night thanks to the 650 fill power, insulated hood with an elastic drawstring, and draft collar. And if that wasn’t enough, careful design work means that the ThermaCapture seams stop heat generated by the body from escaping so instead it can reach zoned areas at the top of the bag that captures hot air as it rises.

This is one toasty bag. One thing we particularly like about this bag is its loop feature. It has series of loops sewn on to the back of the bag that attaches to your sleeping pad via the straps provided, and you won’t lose the straps either as they have their own storage compartment on the front of the bag.

No more rolling on to the cold floor in the middle of the night thank you very much! The down in this bag isn’t just super comfy and warm, it’s Nikwax-treated hydrophobic goose down.

This treatment means less water absorption and faster drying times and this, combined with the durable water repellent polyester lining, makes this bag the perfect companion for potentially soggy adventures. It also comes with a stuff sack for compactness and a larger storage bag.

The polyester lining is rip-resistant too, and a tape lining inside the zip stops it from catching in the zipper itself, and the sleeping bag comes with a limited lifetime warranty in case you do experience any troubles. One thing to bear in mind is that the sizes are a little on the conservative side, so if you’re around 6’ tall you might want to opt for the long length rather than regular.

iGeek Sleeping Bag

Full of unusual perks, the iGeek Sleeping Bag is one of our favorite lightweight options out there.

One of the things that make this bag unique is that it manages to retain its super lightweight of 1.92 lbs despite its extra-large size – it’s so big that you could squeeze two people in there. It can be compressed to a height of just 7.6″ and popped into its carry bag, making it super handy.

It’s also incredibly versatile. If you have two you can join them together to make a double – perfect for those couples weekends away – or it can be unfolded and used as a blanket thanks to the zip running the whole length of the bag, but watch out as the zipper sometimes catches on the lining.

Not only is this bag comfy but you can pop it in the washing machine after a trip, so you don’t have to deal with a stinky bag. A key thing to bear in mind is that this bag doesn’t have down fill and it’s missing some of the features that make other bags warm, therefore it shouldn’t be used in temperatures below 15°C/59℉.

But if you want a large lightweight option for warmer camping trips, then the iGeek sleeping bag is a great find.

Sierra Designs DriDown Backcountry Bed 600-Fill Sleeping Bag

The DriDown Backcountry Bed by Sierra Designs is one of the comfiest bags we’ve found.

Unlike the other mummy bags we’ve mentioned, this one is lacking in velcro, straps, and zippers. To enter, simply slip inside the opening and, depending on the temperature, slot in the comforter to seal the gap and keep you warm or leave it out if you’d like a bit of air.

The lack of external attachments means this backpacking sleeping bag is super squishy and can be molded to your body shape to make sure you get a good night’s rest. Its DriDown padding not only adds to the comfort but is also hydrophobic, keeping it dry for that bit longer and helping it to dry out in no time.

It is lacking slightly in down on the underside of the bag, but with space to slot in a sleeping pad this shouldn’t be a problem (just make sure your pad fits before you head out on any adventures).

Despite all its padding, it still compresses to just 7.5″ x 15″ and is very lightweight for the comfort rating.

Western Mountaineering HighLite Sleeping Bag

The Western Mountaineering HighLite sleeping bag is our lightest featured bag, weighing in at an astonishing 1 lb.

Don’t let the lightweight fool you though – this bag is seriously warm. Not only does it have 850+ goose down fill power but it also has baffled vertical seams for heat retention.

The zip extends halfway down the side of the backpacking sleeping bag, and you can choose whether you’d like it on the left or right-hand side. This bag is also available in a range of sizes – 5’6″, 6,0″, and 6’6″ – so you be sure to find the right fit for you.

It’s fairly expensive, but you won’t have to buy a replacement soon thanks to the unlimited warranty, and this bag is definitely the way to go if you want warmth without weight.

Vango Ultralite Pro 100 Sleeping Bag

Introducing one of our lightest and most affordable options… the Vango Ultralite Pro 100 Sleeping Bag. Despite its low price tag, this ultralight sleeping bag comes with all the essentials. Cleverly crafted with multiple layers, a free-floating layer of insulation adds an extra layer of warmth while the 4T synthetic insulation fibers trap warm air through their channel-like structure.

An aluminized layer returns your body heat to you while you sleep, and elastic on the inner layer mold the bag to your shape to stop any cold pockets from forming. A full-length zip means entering the bag is super simple, and the zipper is guarded so you won’t rip the inner lining. It compresses nicely into its stuff sack and has a handy inner pocket too. It’s also water-resistant and you can adjust the tightness of the hood for maximum comfort.

The main drawback is the lack of down filling that makes it inappropriate for cold camping, but if you’re planning on some warmer trips and want high-end features for a low-end price, then this is the one for you.

Hyke & Byke Shavano Ultralight Down Mummy Sleeping Bag

Hyke & Byke really knew what they were doing when they designed the Shavano 32 Degree C Ultralight sleeping bag.

In fact, they’re so confident in their product they’ve backed it with a lifetime warranty. And with rip-resistant nylon lining, a snag-free drawstring, and anti-rip zippers, it’s easy to see why.

Packed with hydrophobic duck down, this ultralight sleeping bag will keep you warm, snug and dry, and, on top of that, this is one of the lightest down-filled bags out there.

The compression sacks themselves are also water-repellent, and the bag can be packed down to a humble 22 cm by 16 cm bundle. It has a bunch of extra perks too, such as a large foot box for comfort and baffles for extra warmth. Overall, this is the warmest, lightest bag you’ll find at this price.

WINNER OUTFITTERS Mummy Sleeping Bag

But what if you aren’t heading out on a sub-zero mission? And what if you’ll only use your ultralight sleeping bag once or twice a year? Well, you don’t have to break the bank and go for a high-end down-filled option.

Why not try something simple like the WINNER OUTFITTERS mummy sleeping bag instead? Its polyester lining is nice and soft on the skin and you can stretch out your toes after a trek thanks to the foot box at the bottom.

The hollow fiberfill will keep you surprisingly warm for a synthetic fill. Also, the hood and chest can be tightened using snag-free drawstrings and it has a draft collar and zipper draft tubes to keep that extra bit of heat in.

You might even end up overheating in this bag, but not to worry – you can unzip one of the high-quality SBS zippers at the bottom for extra ventilation. You can even pop it in the washing machine when you’re done, although we’d recommend only using a cool, gentle wash – this really is camping made easy.

The polyester coating is rip- and water-resistant and the bag comes with a compression sack so you can take it on all your adventures, and we like that it comes with a sack for storage too. Overall, this is a great bag for the price, but it isn’t the hardiest option available so it’s suited to more casual use.