Ideal for year round mountain use, the Summit 400 XL sleeping bag is filled with 650FP European Duck Down and features a trapezoidal chamber designed to eliminate cold spots.

Using a Pertex® Quantum Pro outer, which is a water-proof, downproof and windproof fabric, the Summit 400 XL weighs 930g and also uses Fluorocarbon free Hydrophobic Down developed in conjunction with Nikwax®. Features a sleep limit of -1.5°C

Other key features include anti-snag zipper webbing tape, 3 dimensional insulated collar and an internal stash pocket for storage. The Summit 400 XL is hand-filled in Derbyshire, UK.


  • Mummy shape
  • Proportionally assigned differential cut 
  • Trapezoidal chamber design to eliminate cold spots 
  • ¾ length YKK 5 coil main zip with full length baffle
  • Internal stash pocket 
  • Left and right hand zips available - can be zipped to other Summits 
  • 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 


Weight: 930g
Down fill weight: 435g
Pertex® Quantum Pro water resistant outer fabric 
Nylon lightweight lining fabric 
650FP European Duck Down 
Rab® Fluorocarbon free  Hydrophobic Down developed in conjunction with Nikwax®
Overall length: 230cm
Max user height: 200cm
Shoulder width: 72cm 
Hip width: 60cm
Foot width: 46cm
Zip: LH

Temperature ratings:

  • Comfort: -4°C
  • Limit: -1.5°C
  • Extreme: temperature: -17°C

Packed size: 20 x 36 cm

Brand Rab
Shipping Weight 1.0000kg

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