Ascent Sleeping Bag: 0F Down

38% OFF

$342.23

$553.50Save $211.28 (38%)

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About this product

The Rab Ascent 0F is a women's down sleeping bag designed for cold-weather backpacking and mountain trekking. Its wide mummy shape provides more room than a traditional mummy cut, supporting freedom of movement and side sleeping comfort without creating cold spots. Proprietary L.O.F.T baffles minimize down migration throughout the bag, helping maintain consistent warmth and packability, while sidewall baffles add loft specifically where side sleepers need it most. The insulation is 650-fill-power hydrophobic European duck down, which resists moisture absorption to preserve warmth in damp conditions. The outer shell is made from Pertex Quantum fabric, a lightweight yet durable material that contributes to the bag's packable profile. Thermal retention is further supported by an anatomical hood, a neck collar that seals in heat around the shoulders, and a shaped footbox contoured to natural foot position. Together these features make the Ascent a well-rounded option for women tackling cold mountain environments.

Category: Sleeping Gear
Brand: Rab
Material: [face] 20D Pertex Quantum (100% nylon ripstop, PFC-free DWR finish), [lining] 20D 100% recycled nylon
Color: Dark Bluebird/Bluebird
Shape: wide mummy
Degree: 0F
Zipper: 3/4-length
Pockets: 1 zippered internal
Venting: zippered side
Activity: backpacking

What people are saying

Reviewers consistently praise the Rab Ascent 900 Women's 0F bag for its genuine warmth, with users reporting comfort in sub-zero conditions and calling it one of the best cold-weather bags they have owned. The women's-specific wide mummy cut, roomy foot box, and soft feel earn repeated compliments, especially from side sleepers and those who find standard mummy bags too restrictive. The Nikwax hydrophobic down treatment and durable Pertex Quantum shell are also highlighted as standout features. The most common criticism is weight and bulk: the bag is noticeably heavier and larger than competing ultralight options, and some users note the temperature rating can feel optimistic without a high-quality sleeping pad. A few reviewers also mention the slippery outer fabric can shift on smooth sleeping pads.