Rab Ascent Down Sleeping Bag (-12°C)

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When comfort and uninterrupted rest are your highest priority, this warm, robust sleeping 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 robust, reliable down-filled bag offers the versatility you need for regular mountain use. 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 trekking and backpacking adventures.

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: -5°C (23°F)
    • Limit of comfort: -12°C (10°F)
    • Extreme: -33°C (-27°F)
  • Limit of Comfort:-12°C / 10°F
  • Packed size:
    • 22cm x 40cm (8.7in x 15.8in)
  • 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: 1350g/2lb 15.62oz
  • Insulation: 650FP European duck down with Grangers fluorocarbon-free hydrophobic finish (680g / 24.0oz)
  • 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: -5°C (23°F)
    • Lmit of comfort: -12°C (10°F)
    • Extreme: -33°C (-27°F)
  • Packed size: 22cm x 40cm (8.7in x 15.8in)
  • Product code: QSN-03

Measurements Regular Long Wide
Sleeping bag length 215cm 230cm 215cm
Max user height 185cm 200cm 185cm
Internal shoulder girth 170cm 172cm 190cm
Internal hip girth 140cm 142cm 150cm
Internal foot girth 108cm 110cm 116cm

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Rab Ascent Down Sleeping Bag (-12°C)
Rab Ascent Down Sleeping Bag (-12°C)
Rab Ascent Down Sleeping Bag (-12°C)
Rab Ascent Down Sleeping Bag (-12°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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