RAB

RAB Ascent 700 Women's - Left Zip

Q: Should I choose a down or synthetic sleeping bag?

Blog - How to choose a sleeping bag The right choice depends on how you camp. Down is lighter and warmer for its weight. Synthetic is better in wet conditions and usually cheaper. Which sleeping bag is best for hiking? Down sleeping bags are best for hiking because they’re lighter and pack smaller, making them easier to carry long distances. Which sleeping bag is better in wet weather? Synthetic sleeping bags are better in wet conditions because they still insulate when damp. Wet down doesn’t. Is a heavier sleeping bag warmer? Generally, yes. A heavier sleeping bag is usually warmer, regardless of whether it’s down or synthetic. Are synthetic sleeping bags better value? Yes. If you’re driving to camp and not carrying it far, synthetic sleeping bags usually give better warmth for the price. Which sleeping bag is easier to look after? Synthetic sleeping bags are easier to clean and maintain. Down needs more care. Quick answers Hiking and light packs: Down Car camping or wet weather: Synthetic Easy care and better value: Synthetic No bad options. Just different trade-offs — and fewer regrets at 3am.

$399.99

~~$899.95~~ $399.99

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The Ascent 700 is a warm bag with a comfortable, wide mummy fit. Filled with 700g of 650FP goose down and with space for wearing additional layers if needed, this bag can be used in cold temperatures. Ideal for three season use and spring conditions similar to those in the UK, New Zealand or Scandinavia.

The women’s specific shape is slightly shorter in length, narrower at the shoulders, and wider at the hips than the regular fit bag for improved efficiency. The Ascent is built with a lightweight and durable, recycled Pertex® Quantum outer fabric and recycled nylon lining. It has trapezoid shaped, boxwall baffles that stack neatly together, encouraging the hydrophobic duck down inside to loft fully and reducing the appearance of cold spots. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth.

The generous mummy fit with wide foot box provide a spacious feel for an easy night’s sleep, and the close-fitting neck baffle keeps the heat in when the temperature drops. It has a ¾ length main zip with a down filled baffle to keep out the draught.

Practicalities are taken care of with an internal zipped stash pocket that easily fits a phone or a headlamp, a cotton storage sack and a compression stuff sack to ensure a manageable pack size and protection on the road. Exploring with a partner or want extra space? Pick up a left and a right zipped bag and you can zip them together.

The Specifics

EN (13537:2012) Temperature rating:ISO EN: Comfort: -2°C (28°F), Limit: -9°C (17°F), Extreme: -27°C (-17°F)
Rab Sleep Limit:Rab Sleep Limit: -9°C (15°F)
Weight:1240g/43.7oz
Product Code:QSD-38
30D Recycled Pertex® Quantum (50gsm) with fluorocarbon-free DWR
Lining: 20D Recycled Nylon (38gsm)
650FP European Duck Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (1100g / 38.8oz)
Trapezoidal boxwall construction, 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
YKK Anti-snag zip insert and anti snag internal zip guard
YKK zipped internal stash pocket
Angled foot box for relaxed sleeping posture
Drawcord stuffsack included
Zipped cotton sack with water-resistant base for home storage
Outer: 100% recycled polyamide. Lining: 100% recycled polyamide.
Wide Mummy Shape - with differencial cut

Rab Sleeping Bag Size Chart

Tapered Mummy Models

	Regular	Long	Wide	Long Wide
Sleeping Bag Length	215cm / 84.6in	230cm / 90.6in	215cm / 84.6in	230cm / 90.6in
Max User Height	185cm / 72.9in	200cm / 78.7in	185cm / 72.8in	200cm / 78.7in
Internal Shoulder Girth	160cm / 63.0in	162cm / 63.8in	180cm / 70.9in	182cm / 71.7in
Internal Hip Girth	134cm / 52.8in	136cm / 53.5in	146cm / 57.5in	148cm / 58.3in
Internal Foot Girth	102cm / 40.2in	104cm / 40.9in	110cm / 43.3in	112cm / 44.1in

FAQs

Should I choose a down or synthetic sleeping bag?

Blog - How to choose a sleeping bag

The right choice depends on how you camp.
Down is lighter and warmer for its weight.
Synthetic is better in wet conditions and usually cheaper.

Which sleeping bag is best for hiking?
Down sleeping bags are best for hiking because they’re lighter and pack smaller, making them easier to carry long distances.

Which sleeping bag is better in wet weather?
Synthetic sleeping bags are better in wet conditions because they still insulate when damp. Wet down doesn’t.

Is a heavier sleeping bag warmer?
Generally, yes. A heavier sleeping bag is usually warmer, regardless of whether it’s down or synthetic.

Are synthetic sleeping bags better value?
Yes. If you’re driving to camp and not carrying it far, synthetic sleeping bags usually give better warmth for the price.

Which sleeping bag is easier to look after?
Synthetic sleeping bags are easier to clean and maintain. Down needs more care.

Quick answers
Hiking and light packs: Down
Car camping or wet weather: Synthetic
Easy care and better value: Synthetic

No bad options. Just different trade-offs — and fewer regrets at 3am.