Rab Women's Ascent Down Sleeping Bag (-24°C)

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When comfort and uninterrupted rest are your highest priority, this ultra-warm, robust down bag offers dependable refuge for trekking and backpacking.

Looking for a sleeping bag that prioritises warmth, comfort, and practicality? That will give you an easy night’s rest in the wild, without compromising on weight or pack size? This ultra-warm, robust down-filled bag offers the reliable protection you need in cold conditions. Armed with 650FP duck down, a spacious wide mummy shape, windproof Pertex® Quantum fabric, and a clever baffle construction that maximises warmth for weight, it's perfect for backpacking and mountain treks.

Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, preserving its loft and warmth.

  • ISO (23537-1:2022) temperature rating
    • Comfort: -15°C (5°F)
    • Limit of comfort: -24°C (-11°F)
    • Extreme: -40°C (-40°F)
  • Packed size
    • 26cm x 45cm (10.2in x 17.7in)
  • L.O.F.T™ construction uses alternating wide and narrow baffles to achieve great warmth for weight.
  • Sleep comfortably on your side thanks to the sidewall baffles, which reduce cold spots and ensure you’re not lying on a seam.
  • A second shorter zip with integrated snap closure allows you to use your arms while retaining heat in your sleeping bag, ideal for cooking in the cold.
  • Cinch in the hood to seal in the heat, while the synthetic insulated collar sits snugly around your neck.
  • Sleep in a relaxed, comfortable position thanks to the roomy, anatomically shaped foot box.
  • Keep valuables and essentials close at hand with a zipped internal stash pocket.
  • Wide mummy fit gives space for extra layers when night temperatures plummet.
  • Internal cordlocks positioned below your collar bone for greater side sleeping comfort.
  • Two-way YKK® ¾ length main zip with synthetic-filled baffle.
  • YKK® anti-snag zip insert and anti-snag internal zip guard.
  • Drawcord stuff sack included.
  • Zipped storage sack with water-resistant base for home storage.
  • Hand-filled in Derbyshire UK.

  • Weight: 1870g/4lb 1.96oz
  • Insulation: 650FP European duck down with Grangers fluorocarbon-free hydrophobic finish (1080g / 38.1oz)
  • Main fabric: 20D Pertex® Quantum nylon ripstop (38g/m²) with fluorocarbon-free DWR
  • Fabric lining: Lining: Recycled 20D nylon, 38g/m²
  • ISO (23537-1:2022) temperature rating
    • Comfort: -15°C (5°F)
    • Limit of comfort: -24°C (-11°F)
    • Extreme: -40°C (-40°F)
  • Packed size: 26cm x 45cm (10.2in x 17.7in)
  • Product code: QSN-27

Measurements Regular Long
Sleeping bag length 200cm 215cm
Max user height 170cm 185cm
Internal shoulder girth 166cm 168cm
Internal hip girth 138cm 140cm
Internal foot girth 108cm 110cm

When you're choosing an insulated jacket or sleeping bag, one of the big decisions is down or synthetic insulation.

Neither is simply better than the other. Down generally wins on weight and packability, while synthetic insulation is usually the safer bet when damp or wet conditions are likely.

Read the full comparison here →

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Rab Women's Ascent Down Sleeping Bag (-24°C)
Rab

Rab's gear has been specifically designed for the trail runner. Combining the latest, lightest fabrics with cutting-edge designs, they created ultra-lightweight clothing that doesn’t compromise on protection. 

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