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Description

Keep your ascent ultralight.

The ultralight Rab Ascent 900 Sleeping Bag boasts an incredible warmth-to-weight ratio and protective features for ultralight backpackers and campers alike. Rab's proprietary Hydrophobic treatment protects the 650-fill duck down from moisture to keep you warm through rainy nights, and the windproof Pertex Microlight shell is surprisingly durable for how light it is. The bag's semi-rectangular shape is roomier than standard mummy bags, and an angled footbox offers extra room so your feet don't feel squished. The Ascent also features an internal collar and a drawcord at the hood to seal out any cold drafts, and a zippered stash pocket that's perfect for headlamps. It comes with a full-length zipper on either the right or left side, and a compression stuff sack for backpacking and a cotton storage sack to keep the bag prime for years.

  • 0° F temperature rating
  • 650-fill duck down with Hydrophobic treatment
  • Semi-rectangular shape, angled footbox
  • Pertex Microlight fabric
  • Internal collar and drawcord for hood
  • Left or right sided zippers available
  • 3 pounds, six ounces: ultralight
  • Internal zippered stash pocket
  • Compression stuff and cotton storage sacks included

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Rab Ascent 900 Sleeping Bag: 0 Degree Down

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Here's what others have to say...

3 5

I hate the zipper--but warm at 35F

  • Familiarity: I've used it once or twice and have initial impressions

I bought the zero degree bag as I always get cold when camping. I used it last weekend for the Ragnar Trail relay. The temps in Snowmass went down to around 35, i had an insulated thermal pad beneath me and i was only just comfortable. I also had to wear my down full-length coat inside the sleeping bag to be cozy. Thus, I don't think I'd ever attempt to sleep in this bag in sub freezing weather. The zipper is also TERRIBLE. I found myself fighting with it throughout the night to get it up all the way. Hard to grab and difficult to slide up (kept getting caught). On scale of 1 to 5 I'd give it a 3.

Responded on

Hi Emily,
That's a bummer this bag didn't work out for you. I've had similar experiences with zippers and poorly filled bags in the past, so I know what it's like to buy something that you're relying on to keep you warm and it doesn't. Have you checked out the Sea-To-Summit Talus TsIII? It's a "1" degree bag aka a 0 degree. I have it's little brother the TsII 14 degree and it's very good for the price. The zipper have a light piece of rigid nylon on the baffle so it doesn't get caught every 5 inches while zipping up. It also has 750 fill duck down that's water resistant. I really like my TsII, thought I'd you give a heads up. If you are feeling rich and never want to fight with zippers again I would look at Western Mountaineering sleeping bags. They are hand made in the US and have +850 goose down fill and are generally the most comfortable bag to sleep in. I have 1 already and i'm looking at getting another.... and maybe another after that. Those are just my thoughts, good luck and stay warm!

Which circle shoulders this sleeping bag

Posted on

Which circle shoulders this sleeping bag

Best Answer Responded on

Hey Pavloar,

The measurement we have listed for circumference is actually across the chest. The full girth at the shoulders should actually be 59 inches around.