Rab Ascent 900 Review: For A Comfortable Night’s Sleep

My family and I went camping for one day last year. My parents had previously taken a three-day trip, but this was my first time. I was anxious since I had trouble sleeping in unfamiliar places, especially outside, when I slept overnight. Recognizing my concern, my mother suggested a Rab Ascent 900.

Thanks to my mother’s recommendation, I knew that there is such a wonderful thing in life. Since then, I can’t go camping without it.

We will go over the product’s specifications, features, benefits, and downsides in our Rab Ascent 900 reviews. Let’s take a closer look at it.

Things You Should Know Before Buying This Product

The Rab Ascent 900 is a sleeping bag that offers dependable protection in cold weather. This down sleeping bag is suitable for people purchasing their first this kind of product and is ideal for those like winter in Norway.

The Rab Ascent 900 sleeping bag is a dependable, long-lasting, and high-performance item designed to comfort and protect cold weather. It is ideal for casual outdoor purposes and prepared for easy mountain expeditions. The rugged, robust, warm, and dependable Ascent is ideal for those wanting to purchase their first sleeping bag. This product provides protection and comfort on hills, trails, and peaks while offering outstanding value for a more technical feature set like a bag.

Made in the United Kingdom

Rab believes that filling their Rab Ascent 900 sleeping bags in their own factory in Derbyshire is the best approach to ensure the quality of their sleeping bags. This gives them complete control over the amount and quality of down used in their bags. Once filled, they are stored uncompressed and leave the factory in the best possible shape.

High-quality material

The Ascent 900 sleeping bag has a durable Pertex® Quantum fabric stuffed with 900g of ethically sourced 650FP European duck. The broad, generous mummy fit and plenty of legroom give comfort and space while keeping you secure and toasty. The fitting collar design, the inside of the collar, and the hood drawstring provide an additional layer of protection to keep you warm in cold weather.

An interior zipped stash pocket stuff pocket that comfortably fits a phone and other items takes care of the practicalities. 


The Ascent 900 weighs 31.7 ounces. This sleeping bag does not have the highest warm light proportions, but Ascent got the warmth wrong, and we believed it was worth it. Carrying a few additional grams is preferable to shaking in a fragile and unpleasant bag.


An overly large sleeping bag, regardless of its fill capacity or weight, will lose heat. To accommodate varied body shapes, standard-sized women’s sleeping bags and extra long sleeping bags are provided. To handle the bulkier apparel required in hostile settings, our Expedition line bags are somewhat more extensive.

The shape is also an essential factor that you need to consider before making a purchase. The majority of love bags use the “mummy” or “tapering mummy” shape. The mummy bag has a wide top to accommodate the shoulders and tapers slightly towards the legs to avoid holes and drafts.

2018 updated version

Since it was tested in 2018, the Ascent 900 has undergone significant alterations. Instead of using Pertex Microlight, previously employed as the bag’s outer shell, the brand chose Pertex Quantum fabric. Both textiles are 100% polyamide-nylon. However, Quantum fabric is roughly 50% lighter than Microlight, weighing 35g/m2 versus 60g/m2. The package still contains 900 g of down and 650 g of feathers. Rather than gray, the bag lining is now red.

Rab Ascent 900 Reviews

What is a Rab Ascent 900? 

Rab is a British maker of climbing and mountaineering gear and equipment. Rab Carrington, a famous Scottish climber, founded the company in Sheffield, South Yorkshire, in 1981. Rab’s initial concentration was on insulating items, specifically down jackets, sleeping bags, and expedition apparel. Synthetic coats, waterproof jackets, overtrousers, gloves, t-shirts, and base layers are now available.

The mattress used was not suited for bags meant for shallow temperatures, according to the Rab. Instead of the usual mattress utilized in the test, users will sleep on a highly insulated winter mattress. The sleeping bag performs worse than what users would expect under typical conditions. As a result, the Rab defines its “Rab sleep limit” as an equal “comfort limit,” although it is based on the athlete’s experience and other bag data estimates.

The first thing we like about this product is that its suitability. It is ideal for people who want to sleep in a comfy sleeping bag when camping. It is particularly great for families with children who want to go camping in the winter without becoming sick with a cold or the flu. Because of its low water absorption may be used in foggy situations and is an excellent all-season bag. The mummy form is fantastic, the broad feet are ideal for sleeping, and the heat retention technology keeps chilly air out for a cozy sensation.

Secondly, this Rab sleeping bag garnered excellent global reviews and feedback. It is well-liked by people who have used it because of the outstanding comfort level it provides, as well as the spacious space for sleeping and turning on the side pleasantly, and the neck-supporting septum that keeps your head in a comfortable posture.

Furthermore, its value is a plus. Because of its lightweight, comfort, and strong resistance to toxins in the environment, the Rab Ascent 900 represents exceptional value for money. This bag serves essential purposes. It is just as resistant to atmospheric drugs as a bag that costs nearly twice as much. It’s a little heavier than some of the more expensive bags in this review, but it still keeps you warm as the weather drops.

Despite these benefits, the Rab Ascent 900 also has a drawback. Unfortunately, the material used in its production is not waterproof; only the quick-drying feature makes the bag suitable for camping use.


  • Excellent suitability
  • High global reviews and feedback
  • Serves important purposes

Cons: Not waterproof

Key Features Of The Rab Ascent 900

Now, let’s take a look at some of this product’s standout characteristics.

Specifications in a nutshell:

  • Sleep limit: -18°C
  • Anti-snag zip guard
  • Angled foot box
  • Compression stuff sack
  • Cotton storage sack
  • Trapezoidal baffle chamber design
  • Weight: 1700g


The Rab Ascent 900 sleeping bag weighs only 1700g, which is low in weight. As a result, it becomes easy for users to put it on the back and shift anywhere required.

Package size

For parents who wish to take their children camping, this bag of the Rab brand is such an ideal choice. There is no need to worry about whether the space for placing the bag is limited or not because the Rab Ascent 900 pack size is 25x32cm, which is relatively small. 

The bag is light in weight and easy to take anyplace. Additionally, it is robust. Therefore, you may use it as many times as you want. This bag is among few products that include a compression sack, which allows you to pack it as securely as possible.

Separation Cut and Baffles

The term baffle refers to the “mesh baffle,” which is the fabric wall dividing the sleeping bag into compartments. The height of the deflection bar is determined by the distance between the sleeping bag inner and the outside shell. The higher fill capacity or weight demands more space, but if the deflector is too high, the cover will sag, gain weight, and exhibit chilly areas. If the deflector is too low, the blanket’s inflating capacity is limited, perhaps reducing the bag’s performance.

The difference in size between the sleeping bag’s inner and outer shells is referred to as a precise fit. When taking a look at a specific range of sleeping bags, the internal pods are ordinarily similar in size. Still, as you move up the range, the external pods become larger to handle heavier blankets or have a higher filling capacity.

Fabrics for the outside

Throughout the collection, the Rab brand uses a variety of textiles. Some conditions necessitate the lightest cloth available, while for others, resilience or waterproofing may be more critical. 

In spite of some light and easy-to-pack outers, they do not provide the same level of moisture protection as the Pertex® Endurance fabric.

The inner lining

The inside linings of the Rab Ascent 900 sleeping bags are made of lightweight and flexible nylon materials, including Pertex® Quantum. It is often more durable than polyester alternatives. Fabric linings are used in sure lower-end bags, although they may add weight and improve the packed size of the bag.

Rab’s sleeping bag liners are available in case you need a more comfortable space. It is helpful because you do not need to wash your bag and can easily enhance warmth frequently.


The Rab sleeping bag has curved hoods, and customizable neck baffles to decrease the rate of heat loss via your head. With the inclusion of the drawstring, you can push the hood close over your face to preserve much heat.


A sleeping bag’s zip is frequently a weak insulating point. The brand reduces this by employing draft tubes, which are insulating pipes that run the entire duration of the zipper.

Outstandingly, zips come with both sides of the Rab Ascent 900. Therefore, it allows you to quickly close it and sleep comfortably in the warmth provided inside.

Our Recommendation For Other Products

Naturehike Ultralight Goose Down Sleeping Bag

[amazon box=”B08CGKMW1D” ]

To begin with, its design is remarkable. It is a hybrid of an envelope and a mummy sleeping bag – Mummy upper body. It is more compact and keeps the head warm. Furthermore, the rectangular design allows you to lower your body and move or expose your feet.

Furthermore, it is composed of high-quality 400T 20D rip-stop nylon, robust, comfortable, and waterproof. It is also lightweight and portable, making it ideal for a variety of outdoor activities.

ECOOPRO Down Sleeping Bag

[amazon box=”B085RNZ56Z” ]

Do you want a warm and lightweight down sleeping bag? Do you want a product that is suitable for adults and children? Are you concerned about how to preserve suitcase space when traveling? This down sleeping bag can meet your needs.

First, it is a high-quality, ultralight waterproof product. It contains up to 90% down and is Teflon-treated for durability and warmth. The recommended temperature range is 0-15°C. Wind and water resistance are provided by 400T polyester with a water-resistant coating.

Furthermore, with dimensions of 86″ long and 30″ broad, this camping sleeping bag can accommodate two adults or two children. Furthermore, it is easy to transport while participating in various outdoor activities such as camping, scout trips, trekking, adventure, climbing, etc. It’s also an excellent choice for an extra bed in a hotel room.

RYONGII Sleeping Bags

[amazon box=”B08HYT9NKN” ]

This product has specific characteristics that we like. It is, first and foremost, waterproof and comfy.

290T Nylon, a waterproof and breathable fabric, is used for the cuter cover. Similarly, the lining is made of polyester pongee. This item is also made of 400GSM elasticated and hollowed-down substitute microfiber. This sleeping bag’s material is soft, pleasant, and breathable, and it immediately springs back to make the product more puffy and cozy.

Second, like the Rab Ascent 900, this item includes 2-way zippers, ideal for a two-person hiking sleeping bag to be used as a double-bag.

Name ImagineOutstanding features
Rab Ascent 900 xP7DZWIrtSiJogT uDMu5TIOTCmvDmgmfZz8pEw kBp1WkC1DmkaFlcw6IC6teEO2rqBF7GBjv 9YIWtf6aRs9s MJ1pFZDo4ZA9PeZwoR8h8RbyfYBkvTkGcIJONzc6JIFzHry9=s0Best for quality
Naturehike Ultralight Goose Down Sleeping BagpJq HHR6BVONKzl7x ClDc9Wse3RW00U812MP7Best for design
ECOOPRO Down Sleeping Bag

AUj2CX9II7Hv12SxIGVbSL1v3PTDC531BxWlf cm3ZVuCw00K2n0Rb74Tlf7t7UbVw1MshkCcvA3aFHzmnClegIglfluPzC6CZWJvZCyN3FQ6n1eml5NbPOwtpqbrjR187Yjw9BY=s0Best for material
RYONGII Sleeping Bags

Best for price

With this comparison, perhaps you will be able to thoroughly analyze your options and make the best selection for yourself. If you are a beginner, take a look at this video:


The Rab Ascent 900 sleeping bag, in particular, is in high demand these days. As a result, we were inspired to devote hours to researching and creating this evaluation for you. This item is worth investing in because it has exceptional features to help you enjoy the most satisfactory camping experience possible.

With a simple design and a low price compared to similar items of the same quality, the Rab sleeping bag is gaining popularity. Furthermore, its characteristics are apparent. It is lightweight, convenient to carry on your back, and takes up little room.

We hope that after reading our review, you will be able to determine the answer for yourself. In case you are intended to go camping by bike, these mountain bikes may be helpful.

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