Rab Ascent 700 Sleeping Bag | -9°C, 650FP, Wide Mummy Shape


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Ideal for those buying their first down sleeping bag for use in cold conditions

The Rab Ascent 700 is a duck down filled, autumn to winter sleeping bag with a wide mummy shape. Designed for regular camping and general mountain use, this bag is ideal for those buying their first down sleeping bag for trekking and backpacking adventures.

Important Specs: 

  • Rab Sleep Limit: -9°C (16°F)
  • 700g of 650 FP Hydrophobic Duck Down
  • Wide Mummy Shape
  • Drawcord stuff sack included 
  • 40cm x 22 cm Pack size & 1290g Weight
  • Max User Height: 185cm / 6ft (72.8")

Materials & Insulation

  • 30D Recycled Pertex® Quantum (50gsm) with fluorocarbon-free DWR
  • 650FP RDS Certified European Duck Down with Nikwax fluorocarbon-free Hydrophobic Finish
  • ISO EN Temperature Ratings
  • Rab Sleep Limit: -9°C
  • Comfort: -2°C
  • Comfort Limit: -9°C
  • Extreme: -27°C


  • 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
  • Left hand zip
  • YKK zipped internal stash pocket
  • YKK Anti-snag zip insert and anti snag internal zip guard
  • Angled foot box for relaxed sleeping posture
  • Zipped cotton sack with water-resistant base for home storage
  • Drawcord stuffsack included
  • Wide mummy shape

A closer look: More about this sleeping bag

Designed for maximum warmth, the trapezoidal boxwall construction maximises loft and insulation for optimal comfort, and to eliminate cold spots. Cut to have a board mummy shape and angled foot box; this bag has a low pack size and weight without compromising on warmth or comfort and still allows for movement. An ergonomically designed, close-fitting internal collar with a hood drawcord, as well as a 3/4 length YKK anti-snag zip with an insulating draft tube to keep out the cold. Comes with a dry bag compression stuff sack for transport and cotton sack with water-resistant base for storage.

Unique baffle filling for a better night's sleep

Hand Filled In Derbyshire. Rab hand fill all their down sleeping bags at their factory in Derbyshire, UK. This ensures that every baffle is filled as required and that the down within has never been compressed or stored in a way that could impair performance. The bags are filled using a smaller diameter pipe and a compressed air system, which blows the feathers into each chamber. Before the bags are filled, one empty shell from each batch is weighed to ensure they are within tolerance. Precision scales are then used to measure the down for each chamber and, once complete, the finished bag is weighed again. To avoid being rejected, the bag’s total weight must be less than 10% over and cannot go under the intended weight. Scales are accurate to 0.5g and are routinely re-calibrated using weights of 1000g, 100g, 10g and 1g.

EN (13537:2012) Temperature rating:ISO EN:

  • Comfort: -2°C (28°F)
  • Limit: -9°C (17°F)
  • Extreme: -27°C (-17°F)

What to know more about sleeping bags? RAB has excellent articles & videos on Sleeping Bags & what insulation is. 

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