Skip to page content
Home » Camping » Sleeping Bags » Down Filling » Ascent 900 Hydrophobic Down Sleeping Bag

Delivery Country and Currency Selector

Please select your delivery country from the drop down below.

Please select your currency from the drop down below.

Update site with selected country and currency

We now ship to United Kingdom from £0.00

If you are not visiting from United Kingdom please select
your country from the drop down below.

Continue To GO Outdoors

Rab Ascent 900 Hydrophobic Down Sleeping Bag

Discount Card Price
Retail Price £270.00

Colour: Chilli Powder
Collect In-Store
Collect In-Store
Available for Reserve & Collect
With your Discount Card

Home Delivery
Home Delivery
Available for Home Delivery

International Delivery
International Delivery
Available for International Delivery - For Selected Countries
Optional Extras


A super-warm, very comfortable, high performance down-filled sleeping bag.

Rab's Ascent range of sleeping bags are duck down filled performance sleeping bags designed for regular use - the Ascent 900 is the warmest, built for use in colder climates.

Made using durable and lightweight Pertex Microlight fabrics, they give you durable build and construction, with very effective warmth for bags of such low weight.

The Ascent 900's roomy semi-rectangular foot area gives you space to move without losing insulation, which is great for those who don't like the restriction of a mummy shaped bag.

The Pertex Microlight* outer shell and inner lining is ultra-light and very densely woven, holding the goose down fill in place without obstructing the bag's breathability.

It comes with two storage sacks - a large storage/carry sack, and a compression stuff sack - giving you the option of compacting the bag down to conserve space in your kit, or keeping it uncompressed for long term storage, to preserve the down.

  • Rab® fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax®
  • Pertex® Microlight inner and outer fabric
  • 650FP European Duck Down
  • Wide mummy shape
  • Proportionally assigned differential cut
  • Internal YKK 3 coil zipped stash pocket
  • Wide foot area for extended comfort
  • 3⁄4 length YKK 5 coil main zip
  • Left and right hand zipped bags will zip together
  • Anti snag zipper webbing tape
  • Internal collar and hood drawcord
  • Trapezoidal baffle chamber design
  • Angled foot box
  • Compression stuff sack, cotton storage sack
  • Weight: 1530g/54oz (+170g/6oz stuffsack) 
  • Hand filled in Derbyshire


Comfort Temperature: -11
Limit Temperature: -19
Extreme Temperature: -40
Fill Power: 650
Fill Weight: 900
Foot Width: 50
Hip Width: 65
Hood: Yes
Insulation Type: Down
Max. User Height: 190
Shape: Mummy
Shoulder Width (cm): 75
Stuff Sack: Yes
Weight (g): 1530
Zip Side: Left Hand
Draught Collar: Yes

Reviews (8)

Sort By:

Add A Review

  • 5 out of 5
Winter in the Brecons, 15 January 2017
By Beergander (Bristol)
Used my new 900 for a night in the Brecon Beacons January '17. It was a harsh night with snow, force 5 winds and a windchill of -10. The bag kept my nice and warm all night. Packing down to a reasonable size for its rating. Nice that it comes with a large lofting bag and compression sac. Would recommend.

  • 5 out of 5
Just as Described, 20 December 2016
By TC (Aberdeen)
Took a while to research. This sleeping bag is everything it claims to be. Very happy with my purchase.

  • 4 out of 5
Fab 900 Ascent, 18 December 2016
By Fell Walker (Chorley)
Beautiful bag. Feels like you're sleeping in a cloud. Much more spacious than cheaper bags, as I've put on a few pounds recently.

I was a bit concerned as I have an allergy to feather pillows, but no problems so far.

I've had to return another item to Rab in the past & found their service excellent.

  • 5 out of 5
rab ascent 900, 07 May 2016
By dagsy (greater manchester)
spending a lot of time in the scottish highlands using a military sleeping bag i decided to upgrade. just returned from 2 weeks using this product and the first few nights woke up with cold areas due to sweating. thinking wearing a tee shirt and cotton shorts turned out to be the remedy for the sweating and coldness problem. immediatly noticed a better sleep. this turned out to be very comfortable, spacious and just the right temperature. it comes with two bags, a small stuff bag and a larger storage bag to protect the down from long storage in a compression sack. i would recommend this product if you are likely to camp in cold locations.

  • 4 out of 5
Rab 900 ascent review, 03 January 2016
By Scott (Horwich)
Just bought this sleeping bag for my Kilimanjaro Climb in October with a Rab approved comfort limit of -19 Celsius for men and -12 celius for women ( this is calculated with a base layer on and socks and thin fleece hat) I found this out by searches on the net.
I did look at other bags form ME, Alpkit, Montane etc but as I have to buy a lot of gear I decided to buy this with a great sleeping mat the Thermarest xtherm mat which is very cosy indeed and top rated too.... A must to keep you warm off the floor below freezing....
I got a great deal by using go outdoors price promise of beating ( by 10%) any in stock like for like size and colour on the net and saved 72 pound by doing so off the retail price!! Fantastic! So well done to go outdoors for this!
Haven't used it yet but I will update on using camping in early spring in the UK and after Kilimanjaro to let you all know information.
I was lacking a lot of info on the net so I thought I would help others get some at a later date.
P.s I'm 5ft6 athletic build and like being slightly warm at night sleeping.....

prev 1 2 next

Size Guide

This size chart should act as a guide only.

Men's Size Chart
Chest Size - 37 40 43 46 48
Waist - 30 32 34 36 40
Inside Leg - 32 32 32 32 32
Arm Length - 33 34 35 36 36

Men's Size Chart
Chest Size - 94 102 109 117 122
Waist - 76 81 86 91 102
Inside Leg - 81 81 81 81 81
Arm Length - 83 86 89 91 91

Women's Size Chart
Chest Size 33 35 37 39 41 -
Waist 26 27 29 31 33 -
Hip 35 37 39 41 43 -
Inside Leg 32 32 32 32 32 -

Women's Size Chart
Chest Size 84 89 94 99 104 -
Waist 66 69 74 79 84 -
Hip 89 94 99 104 109 -
Inside Leg 81 81 81 81 81 -



At GO Outdoors we offer a wide range of delivery options to suit your needs. You can come into one of our fantastic stores to collect or have your items delivered to you at your convenience.

Please see our delivery page for more information. Restrictions apply. Prices and delivery times may vary for remote or rural parts of the UK. Working days are Monday-Friday, excluding UK Bank Holidays.

Collect In-StoreCollect In-Store
Check stock and reserve items at your store for collection the same day. If the items are available for home delivery, then we can arrange to have them delivered to your local store for the following day

Free Delivery over £50 Free Delivery over £50
You've spent over £50, you qualify for free delivery

Next Day Delivery Next Day Delivery
Upgrade your order to next day! Order by 8pm and get your item delivered to you the next day.

Saturday Delivery Saturday Delivery
Order by 8pm Friday for delivery on Saturday (Not available for NI, Channel Islands or Highlands)

AM DeliveryAM Delivery
Order by 8pm and get your item delivered to you by 12pm the next working day (Not available for NI, Channel Islands or Highlands)

Delivery before 10:30amDelivery before 10:30am
Order by 8pm and get your item delivered to you by 10:30am the next working day (Not available for NI, Channel Islands or Highlands)

British Forces Post Office British Forces Post Office
Forces ONLY and cannot be used for civilian or business deliveries

International DeliveryInternational Delivery
International Delivery will take between 7 - 10 days and you are liable for any local duty and/or taxes


Returning an Item

If you receive your order and it is not what you are expecting you can return it back to us within 30 days of receiving the goods for an exchange or refund (including the delivery charge if you return it within 14 days).

You can return your items by using Collect+ or by taking them to any GO Outdoors store (except Hathersage) using your delivery note as proof of purchase.

Unfortunately, orders paid for using PayPal cannot be returned to store and we are currently unable to offer free returns as we offer free delivery over £50 as standard.

See our returns policy for more information.