Rab
Ascent 1100 Sleeping Bag: -15F Down

Out of Stock

Don't worry though, we have a lot more Down Sleeping Bags in stock than that.

Conquer extreme cold with the Ascent 1100 Down Sleeping Bag—ultralight, warm, and adventure-ready

What Our Gearhead® Experts Are Saying:

"This bag is incredibly warm and spacious, making it perfect for extreme winter conditions. The recycled fabric is both lightweight and durable, and the trapezoid baffles do a great job of eliminating cold spots. It's an excellent choice for anyone tackling high-altitude adventures or cold-weather camping."

When temperatures plummet, the Rab Ascent 1100 Down Sleeping Bag is our trusted refuge in extreme conditions. Designed with 650-fill hydrophobic duck down and recycled Pertex Quantum fabric, this bag provides exceptional warmth and durability while remaining lightweight and packable. The wide mummy shape offers comfort for a restful night's sleep, even when layered with additional clothing. Trapezoid-shaped baffles prevent cold spots, and a close-fitting neck baffle keeps heat locked in. The 3/4-length zipper with a down-filled baffle ensures easy access while maintaining warmth. With thoughtful features like an internal stash pocket, compression sack, and left-to-right zip compatibility, the Ascent 1100 is ready to take on the coldest adventures.

Details

Extra cozy sleeping bag for mountaineering, winter camping, and extreme cold expeditions
Hydrophobic duck down provides exceptional warmth and moisture resistance
Recycled Pertex Quantum fabric is lightweight, durable, and eco-friendly
Trapezoid-shaped baffles eliminate cold spots and maximize loft
Wide mummy shape and angled foot box increase comfort
Internal zip pocket keeps your headlamp at the ready
Stuff sack and storage bag included for toting and stowing
Item #RABZ0H3

Responsible Collection: Recycled/Repurposed, Responsibly Sourced
Material: [face fabric] 30D Pertex Quantum (100% recycled nylon), fluorocarbon-free DWR finish, [lining] 20D 100% recycled nylon
Insulation: 650-fill duck down (RDS-certified), Nikwax fluorocarbon-free hydrophobic finish
Shape: wide mummy
Zipper: 3/4-length, left or right
Max User Height: [regular] 6ft .8in, [long] 6ft 6.7in
Shoulder Circumference: [regular] 63in, [long] 63.8in
Hip Circumference: [regular] 52.8in, [long] 53.5in
Foot Circumference: [regular] 42.5in, [long] 43.3in
Bag Length: [regular] 84.6in, [long] 90.6in
Draft Tube: internal 3D collar, zipper baffle
Pockets: [internal] 1 zippered
Pad Retainer: no
Fill Weight: 38.8oz (1100g)
Degree: -13°F
Storage Sack: cotton with drawcord
Stuff Sack: included
Stuff Size: 17.7 x 10.2in
Claimed Weight: [regular] 3lb 12.8oz, [long] 4lb
Activity: backpacking, winter camping, mountaineering
Manufacturer Warranty: lifetime

Reviews

Q&A

What do you think about this product?

Overall Rating

4.5 based on 13 ratings

Review Summary

1 Stars - 0 reviews

2 Stars - 1 reviews

3 Stars - 0 reviews

4 Stars - 1 reviews

5 Stars - 11 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.

Runs smallTrue to sizeRuns large

View

Selecting an option will reload the available reviews on the page

5 out of 5 stars

January 5, 2025

Excellent warmth

Familiarity:: I've used it several times

So happy with this bag. I'm 6'3"" and 210 lbs and it fits very well. The warmth is insane. I have had it in below zero weather yet but down to 5 degrees F it's unreal warm

DaTonz

5 out of 5 stars

May 23, 2024

Excellent sleeping bag - very

Excellent sleeping bag - very warm and comfortable. Only downside is that the zipper can be a bit fiddly. Overall very happy with it.

Paul B.

Originally reviewed on Rab

5 out of 5 stars

January 26, 2024

Totally brilliant sleeping bag. Clearly

Totally brilliant sleeping bag. Clearly not the smallest bag, given the amount of down in it, but well worth it for the comfort. Enough room inside to move which can be an issue with tighter designs. The protecting zip design also works well.

Gavin C.

Originally reviewed on Rab

5 out of 5 stars

December 21, 2023

I’ve used it in the

I’ve used it in the Yorkshire Dales and it is super warm and comfortable. It’s nice and wide for my shoulders. I will be referencing it in future vlogs in YT. Best sleeping bag so far! Warren.

Warren B.

Originally reviewed on Rab

5 out of 5 stars

December 15, 2023

Typical Rab, excellent build quality,

Typical Rab, excellent build quality, cannot fault it.

Adrian P.

Originally reviewed on Rab

5 out of 5 stars

October 17, 2023

Excellent product. And fast delivery.

Excellent product. And fast delivery. I would recommend and I would buy again

James M.

Originally reviewed on Rab

4 out of 5 stars

January 4, 2023

A nice bag & the

A nice bag & the waterproof stuff sack is an unexpected bonus in UK. I also bought the compression spider too which worked very well, but should perhaps be an integral part of the system. As a 63 year old man, I found the temperature rating optimistic.

Ashley H.

Originally reviewed on Rab

5 out of 5 stars

December 27, 2022

Used recently in the cold

Used recently in the cold snap, camping in Scotland. Kept me toasty warm!

Michael C.

Originally reviewed on Rab

2 out of 5 stars

November 12, 2022

I have just spent over

I have just spent over 3 weeks trekking and camping around Kangchenjunga. I bought the Ascent bag for this purpose. It is adequate for overnight temperatures to zero degrees, but not minus 25 C as stated.

Matthew T.

Originally reviewed on Rab

5 out of 5 stars

October 18, 2022

Camped the other night. Wasn’t

Camped the other night. Wasn’t cold enough for it yet. Had to take my very socks of I was that warm. Really looking forward to the frosty nights camping now.

Martin C.