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Rab Ascent 1100 Down Sleeping Bag - Women's (-25C)

Rab Ascent 1100 Down Sleeping Bag - Women's (-25C)
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The warmest in the Ascent range, the Ascent 1100 is a 650FP duck down-filled, adventure-ready sleeping bag with a recycled Pertex® Quantum outer. Designed with a comfortable wide shape and women’s specific fit, it's ideal for those buying their first down sleeping bag for extremely cold conditions.

The Ascent 1100 is an extremely warm bag with a comfortable, wide mummy fit. Filled with 1100g of 650FP goose down and with space for wearing additional layers if needed, this bag can be used in seriously cold temperatures. Ideal for winter use or even as high altitude, base camp refuge.

The Ascent is built with a lightweight and durable, recycled Pertex® Quantum outer fabric and recycled nylon lining. It has trapezoid shaped, boxwall baffles that stack neatly together, encouraging the hydrophobic duck down inside to loft fully and reducing the appearance of cold spots. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth.

The women’s specific shape is slightly shorter in length, narrower at the shoulders, and wider at the hips than the regular fit bag for improved efficiency. The generous mummy fit with wide foot box provide a spacious feel for an easy night’s sleep, and the close-fitting neck baffle keeps the heat in when the temperature drops. It has a ¾ length main zip with a down filled baffle to keep out the draught.

Practicalities are taken care of with an internal zipped stash pocket that easily fits a phone or a headlamp, a cotton storage sack and a compression stuff sack to ensure a manageable pack size and protection on the road. Exploring with a partner or want extra space? Pick up a left and a right zipped bag and you can zip them together.

Bag Weight: 1.67 kg / 3.68 lbs
Fill: 650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish
Fill Weight: 1.10 kg / 2.43 lbs
Bag Shape: Wide Mummy


Rab Sleep Limit:Rab Sleep Limit: -25°C (-15°F)

Product Code:QSD-42

30D Recycled Pertex® Quantum (50gsm) with fluorocarbon-free DWR

Lining: 20D Recycled Nylon (38gsm)

650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (1100g / 38.8oz)

Trapezoidal boxwall construction with differential cut, to maximise loft and warmth

3-dimensional shaped neck collar to seal in warmth

YKK 3/4 length main zip with down filled baffle to trap warmth

YKK zipped internal stash pocket

YKK Anti-snag zip insert and anti snag internal zip guard

Angled foot box for relaxed sleeping posture

Left and right hand bags can zip together

Zipped cotton sack with water-resistant base for home storage

Drawcord stuffsack included

Outer: 100% recycled polyamide. Lining: 100% recycled polyamide.

Wide mummy shape

Bag Length:


Rab Sleep Limit (Metric):

-25 C

Rab Sleep Limit (Imperial):

-13 F

Max User Height (Metric):

170 cm

Max User Height (Imperial):

66.9 in 

Footbox Size (Metric):

108 cm

Footbox Size (Imperial):

42.5 in

Hip Girth (Metric):

134 cm

Hip Girth (Imperial):

52.8 in

Includes Compression Stuff Sack:


Includes Storage Sack:


Includes Stuff Sack:


Shoulder Girth (Metric):

156 cm

Shoulder Girth (Imperial):

61.4 in

Stash Pocket:


Packed Size (Metric):

45 cm X 26 cm

Packed Size (Imperial):

17.7 in x 10.2 in

Product Weight (Metric):

1670 g

Product Weight (Imperial):

58.9 oz

Fill Weight (Metric):

1100 g 

Fill Weight (Imperial):

38.8 oz

Zipper Location:

Left Zip



-22 C

 You're 10 steps away from a clean down sleeping bag

Want a stress free option? We'll wash your down sleeping bag for you. Click here for Rab Wash.

But should you want to wash your sleeping bag at home here are 10 steps for you to follow: 

  1. Clean your washing machine. Before you wash your sleeping bag, make sure your washing machine is clean. This will help to prevent any detergent buildup from damaging your bag.
  2. Turn your sleeping bag inside out. This will help to protect the outer shell of your bag and allow the down or synthetic fill to get a good wash.
  3. Use a non-biological detergent. Biological detergents can break down the down in your sleeping bag, so it's important to use a non-biological detergent instead.
  4. Wash your sleeping bag on a gentle cycle. A gentle cycle will help to protect your sleeping bag from getting damaged.
  5. Add an extra rinse cycle. This will help to remove any leftover detergent from your sleeping bag.
  6. Spin your sleeping bag to remove as much water as possible. This will help your sleeping bag to dry more quickly.
  7. Tumble dry your sleeping bag on a low heat setting. Do not use a high heat setting, as this can damage your sleeping bag.
  8. Check your sleeping bag regularly and turn it over. This will help to ensure that the down or synthetic fill is evenly dried.
  9. Do not use fabric softener. Fabric softener can coat the down or synthetic fill in a film, which can make it difficult for your sleeping bag to trap heat.
  10. Store your sleeping bag in a clean, dry place. This will help to keep it in good condition for years to come.

Top Tips

  • Drying your bag in the tumble drier can take anywhere from 2-4 hours depending on the bag.
    Keep your down sleeping bag uncompressed when storing it.
  • Use the cotton storage sack included.
  • Always in a cool, dry space.

Click here to get a replacement cotton storage sack.

Washing a synthetic sleeping bag

Washing your synthetic sleeping bag is nice and easy. Check the care label for exact instructions. But remember, with synthetic fabrics, it's generally a cool, gentle wash.


  1. Ideally, rinse your washing machine out to clear any residual detergent and softeners.
  2. Use a non-biological liquid detergent, pure soap or a technical cleaner such as our Storm down and synthetic wash.
  3. Machine Wash on a gentle, cool setting. 30ºC is ideal both for your sleeping bag and the environment.
    Tumble dry on a low heat, or synthetic, setting to help restore the loft.


  • Use biological detergent and fabric softeners.
    Dry clean or iron the garment.

Washing a sleeping bag liner

We use two fabrics for our sleeping bag liners: cotton and silk. On our silk liners only natural dyes have been used, so it is not colourfast. Therefore you might consider using a dry-cleaner.

For advice on washing your silk sleeping bag liner yourself, read on.

Hand Washing

Silk can be easily hand-washed.

  • Use lukewarm water and mild, non-alkaline soap.
  • Be gentle on the fabric and don't soak for any more than a few minutes.
  • Do not use harsh detergents that have bleaches or brighteners in them.
  • Don't wring or twist. Roll in a towel to dry

Machine Washing

  • Choose a delicate cycle and use a mild detergent such as Woolite®.
  • Pick the shortest spin cycle option available. Remember to separate your colours.
  • Don't use any detergents with enzymes or brighteners in them.
  • If you've got a top-loading machine, use a mesh bag to protect the silk liner.

When purchasing your item from a registered stockist you enter into a contract of sale with them. Therefore, we would recommend contacting your stockist in the first instance, particularly if the item is less than a year old, as they will have a returns procedure set up to provide a hassle-free service.

All Rab® products come with a guarantee that covers the original owner, with proof of purchase, for the usable lifetime of the product. We are aware that from time to time faults can appear; should a product fail due to defects in workmanship and/or materials, we will repair the item free of charge or replace at our discretion.

 Failure to produce proof of purchase invalidates your warranty. Products which are damaged as a result of an accident, wear and tear, improper care or negligence, or the natural breakdown of materials over time, even if accelerated by environmental conditions, are excluded from the warranty. We do however offer in-house repairs and would recommend contacting our Service Centre by filling out the below form.

Customers are responsible for shipping items to Rab® and we will cover the return shipping costs of all items deemed to be faulty.

 Please note that our current turnaround is 2-3 weeks. 


Ascent Down Sleeping Bag Collection | Rab Lab