Rab Ascent -12C / 10F

The Rab Ascent Down Sleeping Bag (-12°C) is built for reliable warmth, comfort, and practicality on regular mountain and backcountry missions. Designed to balance insulation performance with packability, it delivers dependable cold-weather protection without unnecessary bulk or weight.

Filled with 650 fill power European duck down, the Ascent uses efficient baffle construction to maximise warmth while keeping weight under control. Its wider mummy shape provides extra room for comfort compared to more technical alpine bags, making it an excellent choice for trekking, backpacking, and extended trips where comfort matters as much as thermal efficiency.

A windproof Pertex® Quantum outer fabric helps protect against cold draughts while maintaining a lightweight feel. Hand-filled in the UK, the down is never pre-compressed before use, preserving maximum loft and long-term insulation performance. Robust, versatile, and designed for repeated mountain use, the Ascent is a dependable cold-weather companion.

• 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.

SPECIFICATIONS:

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 ratingComfort: -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)

Product code: QSN-03