Western Mountaineering TerraLite Sleeping Bag: 3-Season Bag for Your Backpacking Trips

The sleeping bag is a camping essential. Of course you can just take a tent or a hammock but if you want to be protected against all sorts of weather conditions and remain perfectly comfortable, you should totally get yourself a sleeping bag.

There are many such bags in the market and trying to choose between them can get rather confusing.

To help you in choosing the perfect one for you, we will be reviewing a sleeping bag today – the Western Mountaineering TerraLite Sleeping Bag. We will discuss all of its features and properties so you can know about this bag in detail.

In the end, we will also mention a few other sleeping bags you should consider before you settle on a single one.

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Product Specifications

  • Continuous baffle construction goes from zipper to zipper
  • 3 dimensional down filled draft tube keeps cold air from disrupting your precious slumber
  • Insulated hood with adjustable draw closure
  • 850 + fill power premium goose down provides a high warmth to weight ratio and excellent compressibility
  • Dual Zipper design allows bag to open completely for heat ventilation or to use as a comforter

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When choosing a sleeping bag, perhaps the most important thing to consider is the temperature and weather conditions of the region where you will be camping. If you want to go hiking in extreme cold, you need a specific winter bag.

However, for moderate or warm temperature, a 3-season bag will do. The weight of the bag is also of huge importance.

If you will be backpacking, you need a lightweight bag which you can carry around without exhausting yourself. However, for car camping, you can even go for heavier sleeping bags. You also need to consider the material of the outer shell as well as the filling.

If the outer shell is water resistant, that is a huge plus as you will be protected against light rain. Filling may be of down or synthetic, and needs to be sufficient enough to keep you warm without making you feel suffocated.

Make sure that the bag you buy is long and wide enough for your height and you will fit in it with ease. Also look at the size of the packed sleeping bag; it needs to be small enough to fit inside your backpack.


The sleeping bag we are going to review today can be used in temperature range of around 25 degrees Fahrenheit. It is a mummy shaped bag with duck down filling and a nylon shell. The sleeping bag is very lightweight and can be packed into a stuff sack.

If you were looking for a sleeping bag for moderate temperature, this one is a good option. It has many design features which will keep you warm without making you feel suffocated. It is also rather durable, and won’t be damaged easily.

Best Used for

Western Mountaineering has made this sleeping bag for backpackers who want to go hiking in moderate temperature. For one thing, it is extremely lightweight. When you are out on a backpacking trip, the amount of weight you carry has to be very precisely calculated.

After all, if you are lugging around way too much weight, you will be tired and exhausted in no time and will have to take very frequent breaks. This is why you need a sleeping bag which will be easy to carry and which won’t make you feel overly burdened.

The sleeping bag comes with own stuff sack, in which it can be folded and packed. This means that you will have a nice, small stuff sack which you can then pack into your backpack and thus save on space. Of course, you can also use the sleeping bag for car camping but it was mainly designed for backpackers.


The sleeping bag comes with own stuff sack. This is a sack in which the bag can be folded and packed. For backpackers, this is a huge advantage as they can then put the stuff sack in their backpack and carry it with them anywhere.

The stuff sack size is 7 x 13 inches. This size is concise enough that it can fit inside any regular backpack. Folding and unfolding the sleeping bag and stuffing it inside its stuff sack is easy and won’t take up too much of your time.

Design and Durability

This TerraLite sleeping bag by Western Mountaineering has an outer shell made of 120 nylon ripstop, with 150 nylon taffeta lining.

The lining is quite comfortable, and feels good against the skin. This is a mummy shaped sleeping bag, which is designed to keep you warm in cool weather while being breathable at the same time.

The bag comes with a hood that can be adjusted with a drawstring. That way, you can decide how tightly you want to close it around your head. There is a draft tube in the region of the zipper, which has down filling.

This draft tube will prevent any cold wind from getting inside the bag. There are continuous baffles, which will keep you warm if it gets chilly outside.

The filling is of 850+ goose down. This filling provides excellent insulation but at the same time it is very lightweight. The entire bag filling weighs only 18 oz. The bag comes with zippers on both sides. This is a great feature as it makes getting in and out of the bag very simple and comfortable.

Another advantage of the dual zipper is that you can open the bag so that it becomes a wide comforter. If you are out on your trip and the weather is nice, you can stop for a while, open and spread out your sleeping bag and sit on it to rest for a bit before resuming your hiking. The bag can also be joined to another TerraLite sleeping bag to form a two-person bag.


The sleeping bag comes in three sizes. The regular one fits a person up to 5’6” in height, the long one is good for people up to 6 feet in height and XL fits a person who is up to 6’6” tall.

The girth of all three sizes is the same at all levels. This bag has a shoulder circumference of 65 inches, hip circumference of 68 inches and foot circumference of 42 inches.

It is wider than regular mummy shaped sleeping bags, and thus is more comfortable. The loft is 5 inches in all three sizes.


The weight of the sleeping bag is less than 2 pounds, and depends on the size of the bag. The regular one weighs 1 lb. 11 oz. while the long one is 1 lb. 13 oz. and XL is 1 lb. 15 oz. in weight. As is apparent, the bag is very lightweight and thus perfect for backpackers.

The sleeping bag has very adequate filling, which will keep you perfectly warm and cozy. The filling does not weigh much and thus the total bag weight is quite less.

Temperature Rating

The sleeping bag is rated at 25 degrees Fahrenheit. As such, it comes under the category of a 3-season bag. You can use it in cold as well as in moderate temperature.

However, keep in mind that if you are planning on going backpacking in severely cold weather, you will be better off with a specialized winter sleeping bag.

This bag will keep you warm in the mentioned temperature range and it can also be used in higher temperatures. If you feel hot and sweaty, you can open the zippers and let the breeze in. If it gets cold, you can close the zipper and pull the drawstring around the hood tight to insulate yourself against the cold weather.

Value for Money

If you are on a budget and you want to purchase a sleeping bag for hiking purposes, you will be able to find one that costs less than this one. At the same time, keep in mind that this bag is extremely lightweight and very easy to carry.

Therefore, if you want to buy a three season bag which will last a long time, you should invest in this one.

It is quite durable and made of high-quality fabric. It can also open to form a large comforter, and will serve you well in both cold and moderate weather. This is why, this sleeping bag has good value for money and you should buy it if you can afford it.

Close Competitors: Other Products you may Like

Now that we are talking about sleeping bags, let’s discuss a few more. We will mention three sleeping bags which you should consider, in case you have not yet made up your mind. One of them is by Western Mountaineering, while the other two bags are from different manufacturers.

Western Mountaineering Kodiak GWS

Western Mountaineering Kodiak GWS is a high-quality, mummy shaped sleeping bag that is guaranteed to keep you very warm even at low temperature. The bag has a ripstop exterior which is not only water-resistant, it is also resistant to strong winds. The draft tube and hood will ensure that you are warm at all times.

The bag comes with continuous baffles, which you can move about according to your own comfort. If you are feeling cold, move them over you to provide better insulation; if the weather is warm, move them underneath you. This is why this bag is considered a 4 season bag.

The sleeping bag is large enough that people of all heights can fit in it. It is very well-insulated. The total bag weight is only 3 lbs. 2 oz. and thus this is a great lightweight option for those people who want to go backpacking.

This bag is a little pricey, but it is well worth the price as it can be used in any weather condition and is very convenient to carry around.

Nemo Sonic Down Sleeping Bag

Nemo Sonic Down Sleeping Bag is meant for 15 degree Fahrenheit. It is a mummy shaped bag with a durable nylon exterior. The product has a central zipper, which makes it very easy and convenient to get in and out of the bag.

The sleeping bag comes designed with Thermo Gills, which let you regulate the temperature of the inside of the bag by up to 20 degrees. This means that you can be as warm as you like, without ever feeling suffocated or too hot. 

The filling is a mixture of down and synthetic, and is adequately placed so there will be no cold spots. The bag is quite wide and comfortable, and you will be relaxed all through the night.

You can fold this sleeping bag to a small size, and then can pack it in your backpack when you are heading out on a hiking trip.

Sea to Summit Talus TS III Sleeping Bag

Sea to Summit Talus TS III is another sleeping bag which is made of a nylon exterior. Although the bag is mummy shaped, it is quite roomy and wide at the region of the shoulders and chest. As a result, you won’t feel claustrophobic in this bag and will even be able to sleep on your side.

There are 3-dimensional side walls, as well as side block and offset baffles. The product weighs 4.2 pounds and thus is a good option for backpackers. There is a zipper on the left side, which is anti-snag and quite sturdy.

The sleeping bag will do a good job of keeping you warm. It has a very well-designed hood which will keep your head warm. The filling is distributed very aptly, and there will be no cold spots. This sleeping bag is a good one for cold weather.


The sleeping bag is a good, lightweight one which will serve you well on all your hiking and backpacking trips. It does a great job of keeping you warm in moderate to cold weather, and will protect you from the elements. To recap all that we discussed so far, let’s list the pros and cons of the bag.


  • Very lightweight
  • Can be packed to a small size in the provided stuff sack
  • Dual zipper makes it simple to get in and out of the bag.
  • Bag can be opened to form a large comforter, in case the weather is warm or you just want to relax under the sky for a while
  • You can join two such bags to form one large sleeping bag for two people
  • Will keep you warm and comfortable in the designated temperature of 25 degree Fahrenheit
  • Spacious


  • Costs more than many 3 season sleeping bags available in the market
  • Sleeping pad is not provided
  • Not meant for very cold weather

If you want a three-season sleeping bag which will protect you from the cold while at the same time prevent you from feeling suffocated, this is a bag you should consider buying. It is also very lightweight and you can put it in its stuff sack and then carry it in your backpack.

However, if you are on a tight budget, you might find the bag to be a little too expensive. In that case, you should look for another option.

If you want to go trekking in extreme cold weather, you should consider buying another sleeping bag as this one is not sufficient for very low temperature.

Western Mountaineering TerraLite Sleeping Bag
  • Packaging
  • Design and Durability
  • Size
  • Weight
  • Temperature Rating
  • Value for Money
  • Warranty


TerraLite sleeping bag by Western Mountaineering is a mummy shaped bag meant for temperature of around 25 degrees Fahrenheit. The bag has a very well designed hood as well as a draft tube, which will keep you warm and cozy. It is made of durable and breathable nylon fabric, and you won’t feel suffocated in the bag. The sleeping bag comes in three sizes: regular, long and XL. People who have a height of up to 6’6” can fit in the bag (the XL one). The bag has a total weight of 1 lb. 11 oz. to 1 lb. 15 oz. depending on the size. Thus, it weighs less than 2 pounds and is very easy to carry. Although it is a mummy shaped bag, it is still quite comfortable because it is wider than most such bags. You can hope to have a good night’s sleep in this bag. The sleeping bag is a little expensive, and thus some people might find it difficult to afford the bag. However, considering its lightweight, high-quality material, the bag actually has good value for money.

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2 thoughts on “Western Mountaineering TerraLite Sleeping Bag: 3-Season Bag for Your Backpacking Trips”

  1. Sea to Summit Talus TS III looks so good. I love the style as well as the color. I still have a sleeping bag, but I am planning to get another one for my brother so I will surely put it on my list of choices. It also helps that the price is reasonable and the reviews are mostly positive.


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