Free UK Shipping Over £85 | 30 Days returns Policy | Most Trusted Since 1983


Your Cart is Empty


Rab Summit 400 XL

Zip Side

The Rab Summit 400 is a mid-weight down-filled sleeping bag, designed for year-round mountain use. This X-Long version provides a longer body and slightly broader fit for taller individuals.

Using a combination of Pertex® Endurance outer and light-weight Nylon inner fabrics, the Summit 400 is filled with 650FP European Duck Down and features a trapezoidal chamber design to eliminate cold spots. Other key features include anti-snag zipper webbing tape, 3 dimensional insulated collar and an internal stash pocket for storage. Temperature tested to the new European standard (EN13537:2012), the Summit 400 is hand-filled in Derbyshire, UK.

Remember, temperature ratings are used to indicate a bags performance and help you decide between models. However, they are subjective and can be greatly affected by factors such as what you're happy to wear (clothing wise) in conjunction with the bag, your health and metabolism, how much you have had to eat or drink, humidity and altitude, the type of shelter used and whether you are using a suitable insulating mat.

As a guide, the "Comfort" rating indicates the range at which a woman gets a comfortable night’s sleep, the "Limit of Comfort" rating indicates the range at which a man gets a comfortable night’s sleep and the "Extreme" rating indicates a range at which a woman is protected from hypothermia. The Extreme rating is basically a survival rating and it is not advisable to rely on this for general use.

More Help? For further assistance on choosing your down sleeping bag, please view the various help videos available under the 'Videos' tab above. We also have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags.


Pertex® Endurance water resistant outer fabric
Nylon lightweight lining fabric
650FP European Duck Down
Rab® Fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax®
Mummy shape
Proportionally assigned differential cut
Trapezoidal chamber design to eliminate cold spots
YKK 5 coil main zip with full length baffle
Internal stash pocket
Left and right hand zips available
Anti-snag zipper webbing tape
3 dimensional insulated collar with internal drawcord
Angled footbox for comfort
Compression stuff sack
Cotton storage sack
Temperature tested to European Standard EN13537:2012

Hand filled in Derbyshire UK


  • Compressed Size: 34 x 16 cm
  • Length: 238cm (Max user height 200cm)
  • Manufacturer: Rab
  • Fill Power: 650
  • Weight: 930g


Don't Miss The Next Big Deal!