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It does have a downside: you'll want to sleep in.

A body-embracing mummy filled with water-repellent, always-lofty down, the Big Agnes Lost Lake SL Sleeping Bag: 30 Degree Down ensures a glorious night's sleep three seasons of the year. Comfort rated at 30F and surrounded in draft protection, this feathery womb is one you won't want to leave. While it's great that you're so cozy, you do have places to go.

  • Cozy 30F-degree temperature rating makes the bag ideal for camping late spring through early fall
  • Light and lofty 700-fill DownTek water-repellent down insulation won't clump up or freeze, because it won't get wet even in a downpour
  • Traditional style mummy bag features full insulation underneath (unlike other Big Agnes System bags with integrated pad sleeve)
  • Durable nylon fabric shell resists water, and smooth nylon taffeta lining resists stains
  • Draft collar, draft wedge, and draft zipper ensure warm air stays in and cold air keeps out
  • Left- and right-zip bags mate together for a cozy coupling
  • Insotect Flow construction evenly distributes heat with flow-optimization and baffle design
  • Mesh storage sack and nylon stuff sack included for convenient storing and packing

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Here's what others have to say...

How spacious is this for larger waisted people?

Mark, Im about a size 42-44 and it fits a bit snug. It was a bit difficult to zip and maneuver, once zipped it was manageable. I just used this in 37 degree weather on a bicycle overnight in the desert. My upper body was warm, feet were fine with double socks, but my legs had some cold spots, if I wore my wool tights I think I would have been way warmer, but that was my fault. All in all it worked pretty good.



    I also meant to mention that the hood is really nice. I can shove a sweater up in there and it stays put for a really functional pillow.


    Great bag

      I've spent 6 nights with this bag since I got it. A few weeks ago. Warm nights in the 50s I really appreciated the full zipper so I could lay almost completely out of the bag. It's not ideal for those conditions but it works fine. And Nights at high elevation in the mid 30s were comfortable. I usually run cold and even I felt like it could have been a few degrees colder and still comfy. I did have long underwear and a beanie on though. It's a bit constrictive but that's just part of having a mummy bag I think. Could be lighter but the full zipper is worth it for me. All in all I'm a happy customer.

      Does this bag have a sleeve for a sleeping...

      Does this bag have a sleeve for a sleeping pad?

      Unlike Big Agnes' traditional design they actually do no not have a pad sleeve on this sleeping bag.