Best Warm Weather Sleeping Bags For Hot Climates

Best Warm Weather Sleeping Bags For Hot Climates

best warm weather sleeping bags for backpacking

Choosing the Best Warm Weather Sleeping Bags For Backpacking

When you’re camping or backpacking, you want to wake up fresh every morning—ready for the day’s adventures. This means it’s imperative that you get a good nights’ sleep! But when you’re backpacking in countries with hot climates, it can be hard to sleep well if you’re sweaty, overheating, and uncomfortable. So to guarantee you get a great snooze in hot climes, you need a sleeping bag that isn’t going to overheat easily. If you’re unsure which to choose, check out our guide to choosing the best warm weather sleeping bags for hot climates at the bottom of the page.

  • Click Here for our Top 12 Cold Weather Sleeping Bags

Whether you plan on mainly sleeping in backpacking hostels or are taking a tent/hammock to camp wherever possible then a sleeping pad is almost as important as your sleeping bag. Check out our guide to sleeping pads here!

Top 10 Best Warm Weather Sleeping Bags


Sea To Summit Spark Sp I Sleeping Bag

Sea To Summit Spark Sp I Sleeping Bag

WEIGHT:  lbs  oz / 360 g

TEMPERATURE: 46° F / 8° c

PACK SIZE: 1.55 litres

MATERIALS: ULTRA-DRY Down 850+ FP European Goose Down insulation, 10D Pertex Quantum shell

The Sea To Summit Spark Sp I is a super lightweight sleeping bag for hot climates that compresses down so small you would not even believe it is a sleeping bag. About as minimal as it gets, the Spark Sp I is so packable that it can be used as a sleeping bag liner on winter expeditions. The ULTRA-DRY Down and Pertex shell help to repel moisture and keep you warm on damp nights in the tent. If you are looking for the lightest option then the Spark Sp I is possibly best warm weather sleeping bag for you.

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Marmot Atom Sleeping Bag

Marmot Atom Sleeping Bag

WEIGHT: 1 lbs 5 oz / 590 g

TEMPERATURE: 40° F / 4° c

PACK SIZE: 3.6 litres

MATERIALS: Certified 800+ Fill Power Goose Down insulation, Pertex Microlight 20d 100% Nylon Ripstop DWR shell

The Marmot Atom is another ultra-lightweight sleeping bag that excels in warmer conditions and packs down incredibly small. The silky smooth lining never feels clammy and the fold-down second zipper increases ventilation on hot nights. The sewn-thru curved baffle helps to keep the down from shifting while the hood and foot box are both designed to minimize heat loss. The Down Defender improves water resistance on the inside while the Pertex shell does a good job of deflecting moisture on the outside. One of the best sleeping bags for warm weather backpacking as well as summer expeditions.

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Thermarest Corus HD Quilt

Thermarest Corus HD Quilt

WEIGHT: 1 lb 6 oz / 640 g

TEMPERATURE: 35° F / 2° c

PACK SIZE: 10″ x 7″ / 25 cm x 17 cm

MATERIALS: 650-fill Nikwax Hydrophobic Down insulation, 20D RipStop Polyester DWR shell, 20D Polyester Taffeta lining

The Thermarest Corus HD Quilt is not quite a sleeping bag but it does have a foot box and sleeping pad attachment. A large baffle runs around the entire quilt to lock in heat and prevent any unwanted drafts which can also be tucked underneath for the sleeping bag effect. Ventilation is not an issue with this design, allowing you to stick your feet out of the end if you wish or cocoon up in the foot box. The Nikwax Hydrophobic Down has been treated to repel water and dry out very fast to dispell all the myths about being useless when wet. The Corus HD quilt is incredibly versatile and great for lightweight backpacking or even keeping in the car for emergencies.

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Western Mountaineering Mitylite Sleeping Bag

Western Mountaineering Mitylite Sleeping Bag

WEIGHT: 1 lbs 10 oz / 735 g

TEMPERATURE: 40° F / 4° c

PACK SIZE: 6″ x 12″ / 15 cm x 30 cm

MATERIALS: 12 oz Down insulation, 0.9-ounce ripstop shell

The Western Mountaineering Mitylite is a semi-rectangular summer sleeping bag with a sewn thru construction and horizontal chambers. Because of its rectangular shape, it can be zipped to other sleeping bags to make a double or unzipped completely to use as a quilt. The 6-inch continuous chambers have a 3-inch loft which helps to retain body heat on cold nights and packs down nice and small. Made in the USA, the Mitylite is suitable for lightweight backpacking trips where the temperature rarely drops below 0° C or when you intend to stay in hostels/couch surf.

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Mountain Hardwear Down Flip 35/50F Sleeping Bag

Mountain Hardwear Down Flip 35 50F Sleeping Bag

WEIGHT: 1 lb 12 oz / 788 g

TEMPERATURE: 35/50° F (1/10° c)

PACK SIZE: 7″ x 14″ / 18 cm x 36 cm

MATERIALS: Q.Shield Down 600-fill insulation, 30D Nylon Plain Weave shell, 30D Nylon Plain Weave lining

The Mountain Hardwear Down Flip 35/50F is a semi-rectangular sleeping bag with more insulation on one side allowing you to flip it to suit the temperature. The Q.Shield Down is treated to resist moisture and maintain maximum loft to keep you warm in damp conditions. The wide cut of the bag gives you plenty of space to stretch out at night as well as open it up to use as a double duvet in the back of the van. With great ventilation, this is a top sleeping bag for warm countries, backpacking hostels, road trips, and van life.

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Sierra Designs DriDown Backcountry Bed 600 Sleeping Bag

Sierra Designs DriDown Backcountry Bed 600 Sleeping Bag

WEIGHT: 2 lbs 8 oz / 1,130 g

TEMPERATURE: 27° F / -3° c

PACK SIZE: 7.5″ x 15″ / 19 cm x 38 cm

MATERIALS: 600 Fill Duck DriDown insulation, 30D Polyester Ripstop shell, 30D Polyester Taffeta lining

The Sierra Designs DriDown Backcountry Bed 600 Sleeping Bag has a versatile integrated comforter which allows you to stay wrapped up and open the top for ventilation at the same time. The Sierra Designs sleeping bags really are as comfy as they look and allow lots of upper body space to sleep on your back, side, or front – or rotate between all three on restless nights! You can go even lighter with the 2-season version of this bag but are then more limited with the places you can comfortably use it. A really cool 3-season sleeping bag for unpredictable warm weather.

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NEMO Salsa Sleeping Bag

NEMO Salsa Sleeping Bag

WEIGHT: 2 lbs 1 oz / 940 g

TEMPERATURE: 30 F / -1 c

PACK SIZE: 16″ x 8.5″ / 41 cm x 22 cm

MATERIALS: 650 Fill Power Down with Downtek insulation, 30D Nylon Ripstop with DWR shell, 30D Nylon Ripstop with DWR foot box, 30D Nylon Taffeta with DWR lining

The NEMO Salsa is a 3-season spoon-shaped sleeping bag designed for backpacking in warmer climates. The shape is a kind of mummy/rectangular hybrid that adds extra room for your knees and elbows if you are a sideways sleeper. With a stretch construction and stitching, this is a comfortable bag to not just sleep in but to lounge around in as well. NEMO‘s 650 FP down is super light and will keep you warm on chilly nights as well as regulate your heat on warmer nights. Other features include an adjustable hood, pillow slot, and zippered valuables pocket.

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Big Agnes Cross Mountain 45 Sleeping Bag

Big Agnes Cross Mountain 45 Sleeping Bag

WEIGHT: 1 lb 10 oz / 737 g

TEMPERATURE: 45° F / 7° c

PACK SIZE: 7.5″ x 6″ / 19 cm x 15 cm

MATERIALS: Hotstream by Insotect – 100% recycled polyester insulation, Nylon rip-stop shell with DWR, Nylon taffeta lining

The Big Agnes Cross Mountain 45 sleeping bag is designed to hold any 20-inch rectangular sleeping pad in the sleeve at the bottom. This means that you don’t roll off your bed in the night and adds to a better night’s sleep overall. The synthetic insulation is very light and soft with properties very similar to feather down and it packs down very small for a synthetic bag. The main benefits of this synthetic sleeping bag are that it can be used in all conditions and has more space than a mummy bag. This bag would be ideal for hot, humid, wet places like rainforests where keeping all your gear dry is near impossible.

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Marmot Nanowave Sleeping Bag

Marmot Nanowave Sleeping Bag

WEIGHT: 1 lb 13 oz / 822 g

TEMPERATURE: 45° F / 7° c

PACK SIZE: 5 Litres

MATERIALS: Synthetic Spirafil High Loft insulation, 50d Polyester shell with DWR, 50d Polyester lining

The Marmot Nanowave Sleeping Bag uses a high-loft synthetic insulation and so will keep you warm even when wet. The best thing about this sleeping bag though is the price. The Nanowave is great value for money so if you already have a high-end winter bag then you don’t need to spend a lot of money to equip yourself for warmer climates. The only issue with this bag is that it doesn’t pack down as small as other bags on this list but other than that you can go wrong.

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North Face Aleutian 55 F Sleeping Bag

The North Face Aleutian 55 F Sleeping Bag

WEIGHT: 1 lb 11 oz / 762 g

TEMPERATURE: 55° F / 13° c

PACK SIZE: 7″ x 11″ / 18 cm x 28 cm

MATERIALS: Heatseeker Eco synthetic insulation

The North Face Aleutian 55 F Sleeping Bag is a cheap sleeping bag rated for hot countries and summer weather. As with other synthetic sleeping bags, it doesn’t pack down very small but it will keep you warm even if it gets wet. It has a full-length zipper on one side which runs right around the foot box enabling you to open it up like a blanket as well as a quarter length zip on the other side for more sleeping options. A good value summer sleeping bag ideal for festivals and casual camping when the weather is nice.

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Temperature Rating

The first—and most important—aspect to consider when buying a sleeping bag is the temperature rating. In 2005, the European Advisory developed a legal standard for sleeping bags across all manufacturers. These temperature ratings have also been adopted in other parts of the world and are displayed in terms of “comfort” levels.

The “comfort temperature” on a bag is the minimum possible temperature that the sleeping bag is designed to withstand before the average human will get cold. These ratings range from a human’s “lower comfort level” to “upper comfort level” and “extreme” ratings (for the coldest temperatures). These ratings should be used as a guide to match your sleeping bag with the climate you are going to but it is by no means 100% accurate. Just don’t buy a sleeping bag that’s designed for -10° C conditions and you should be able to manage in most places.

Season Rating

To make it simpler, sleeping bags also come with season ratings. The codes for ratings are:

  • Season 1: Summer (for use when the temperature is above 5 degrees).
  • Season 2: Spring/Summer (+0 degrees).
  • Season 3: Spring/Summer/Autumn (0 to -5 degrees).
  • Season 4: Year-round (-12 degrees and lower).
  • Season 5: Extremely cold conditions!

So if you’re heading to hot places, you’re best to buy a sleeping bag with a Season 1 or 2 rating.

Personal Choice

As with everything in life, some people can “take the heat” more than others. So when buying a sleeping bag, you need to consider your personal ability to cope with heat. If you’re comfortable in warmer conditions, you should take this into account and possibly opt for a Season 2 bag. In general, women feel the cold more than men and have a lower body temperature at night than men, so tend to need a slightly warmer sleeping bag. A good rule of thumb is to buy a sleeping bag that is slightly warmer than you think you’ll need, as you can always take more clothes off and open ventilation zips.

best sleeping bags for hot climates

Material

When choosing any camping gear, one of the factors to consider is which material best suits your purpose. Most sleeping bags comprise either synthetic fabric or down. When you’re traveling to hot places, synthetic-filled sleeping bags are a far better choice as they’re less insulating than down. They also retain 50% of their insulating capabilities when wet, which is ideal for damp and humid places.

Synthetic sleeping bags are also cheaper and need less care and cleaning than down sleeping bags, which makes them ideal for backpacking where you may be on a budget or traversing grubby environments. The downside of synthetic bags is that they can be bulkier and weigh more than down sleeping bags, so if you have a heavy rucksack, this can be troublesome.

It’s also worth considering what the lining fabric is made of. In hot climates, avoid flannel linings due to its insulating capabilities. Opt for something light and breathable, such as cotton. If it’s extremely hot but you still want some protection, you can buy a silk sleeping bag liner and use it instead of a sleeping bag, as silk keeps you incredibly cool.

Shape and size vs. weight

Sleeping bags come in a range of shapes and sizes. The most common types are rectangular or “envelope” shaped sleeping bags, and tapered or “mummy” shaped sleeping bags.

Mummy: With a “mummy” sleeping bag, as you can imagine, the bag fits around your body as if you are mummified. Cheerful, right? The tapering of the bag means better heat retention, so this shape isn’t ideal for hot places. However, this type of bag weighs less than a rectangular bag. Mummy bags come with a “stuff” sack, topped with a drawstring and toggle, which enables them to be compressed dramatically. This makes it much easier to carry them when backpacking.

Rectangular: With a rectangular bag, there is a zip around two sides, meaning the bag can be opened fully to form a blanket, and gives you extra room to move around in when zipped up. This is often better for warmer conditions, as it is less insulating, and allows more air flow. However, rectangle bags weigh more than “mummy” bags, and they usually don’t come with a compression sack, so they can be bulky to carry, especially when backpacking.

Which to choose? When you’re deciding which shape sleeping bag to take backpacking in hot climates, it’s often better to buy a lightweight mummy bag that compresses small and has full-length zips so you can create ventilation if you get too warm—or find a lightweight rectangular bag with a stuff sack so it’s not too bulky to carry.

Zips

When it comes to sleeping bag zips, there are a few things to consider:

  • Left or right-handed zips: To make it easier to hop out for a late night call of nature, choose the right zip for you. Right-handed people need left-sided zips and vice versa.
  • Two-way zip: In warm conditions, it’s useful to have a two-way zip as you can create extra ventilation.
  • Full-length or half-length: It’s also better to opt for a full-length zip in hot places as you can open up your bag fully to let out the heat.

Added extras

When backpacking, especially if you’re staying in hostels, it’s a good idea to look for a bag with inner pockets, usually placed near the top of the sleeping bag. This way, you can keep your valuable items close to you, such as your mobile phone or wallet.


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