Free Shipping on Orders Over $50 - Some Exclusions Apply*
  • 1-855-461-8660

  • Live Chat with a Gearhead

  • 100% Guaranteed Returns

Spend 100 Get 20 CreditsSpend 100 Get 20 Credits


Feel better day and night.

Big Agnes designed the Lost Ranger 15-Degree Down Sleeping Bag to maximize the efficiency of its materials, so it milks all the performance possible out of the lightest, most compact construction possible. That means you stay more comfortable in the bag and while you hike. The Lost Ranger also has Big Agnes' famous sleeping pad pocket and insulation-free bottom so you never roll off your sleeping pad again and you don't have to carry around a bunch of unnecessary insulation.

  • 15 degree rating offers lots of versatility for camping in all conditions but the hottest part of summer and the coldest part of winter
  • Downtek treated water repellent down maintains loft and insulating properties when wet and provides anti-microbial and anti-bacterial protection
  • Rectangular shape for more space and greater comfort in multiple sleep positions
  • Nylon microfiber ripstop material for durability
  • Draft collar seals out cold air
  • Full-length zipper with draft tube seals out cold air and allows you to zip left- and right-zipper bags together
  • Full-length sleeping pad pocket so you never roll off your pad again
  • No insulation on the bottom of the bag, pad keeps you warmer than smashed insulation would
  • Insotect Tubic insulation system provides the maximum cubic loft for optimal thermal efficiency
  • Super-light (just over 2.5 pounds)
  • Pillow pocket for maximum sleep comfort
  • Includes mesh storage sack and nylon stuff sack

Share your thoughts

Review Summary
4 4
0 3
0 2
0 1

What do you think of the

Big Agnes Lost Ranger Sleeping Bag: 15 Degree Down

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(Optional)

Invalid filetype.


Here's what others have to say...

Ranger 15

Ranger 15

Posted on

Ranger 15 is gonna keep you warm and toasty on those chilly spring and fall nights.

Great 15 degree bag

Great 15 degree bag

Posted on

Here's our trusty gearhead Kyle Wall taking a snooze on the clock in the ranger bag. Wake up Kyle who do you think you are George Costanza?!?! Kyle is about 6 ft tall and he had plenty of room in this bag. Fire over any questions you have.

Responded on

Which size is Kyle using? I'm about the same height and thinking of getting this bag. Also, how well does this bag pack?

Responded on

Kyle is in the reg size. The bag packs extremely well. Stuffs to 8 x 17.5 which i think is great for what you're getting here.

Responded on

The specs say "Max User Height: [regular] 5 ft 10 in, [long] 6 ft 6 in," but you say Kyle is ~6' and in a regular bag. I am 5'11" and am trying to figure out which bag to get. Would there really be plenty of room in a regular for me?

5 5

Solid, No fuss bag.

  • Familiarity: I've put it through the wringer

I am pretty rough on gear and I expect it to stand up to whatever I throw at it, this bag does the job. I bought this bag to use during the summer while we were on fire assignments. I wanted a bag that was lightweight and that I could stuff in my gear bag and still have room for everything else I have to carry on a 14 day assignment. It lived up to my expectations and more. I bought a STS e-vent stuff sack to store it in and it squeezes it down to a nice 8x8" package. It kept me comfortable in anywhere from 40 to 15 degree nights and thats really all I can ask for. I usually just slept in shorts, socks and a merino beanie.
Once, we had just gotten off of a 18 hr shift and went to bed down in the middle of the day. I threw the bag down under some aspens and never had to worry about the durability due to the thicker material on the bottom. I woke up to an unexpected mountain squall and the bag got wet but it dried very quickly and never lost any loft in the down. Really can't ask for anything more in a bag in this price range. I am a Big Agnes fan for life.

5 5

Great bag but not for 15deg temps

  • Familiarity: I've put it through the wringer

I got the DT Lost Ranger last year for dual-sport motorcycle trips. I like it's roomy size, light weight, and compact pack size. I'm not sure why they bother to call it a 15deg bag and then say it's comfortable to 30degrees though? Marketing I suppose... Around freezing I have difficulty staying asleep even w/ fleece pants/shirt (I use it with a Exped Downmat 9). One thing I like about the bag is it's roomy cut for layering bags. If I expect it to get near/below freezing I put a Pitchpine 45 inside the LR. With a Lost Lake 30 inside the LR I've slept comfortable at -7deg. (Yes, I love BA bags) The Lost Ranger is a great all around bag as long as you don't expect to stay warm at 15deg.

Here it is packed.

Great bag but not for 15deg temps
Responded on

Thanks for this picture, it''s very helpful!

5 5


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

Used in southern Utah, temps in the mid-30s and low 40s. Along with the air-core pad this was exceptionally comfortable and I'm a notoriously bad backcountry sleeper. I prefer the extra room and am definitely a fanboy of the integrated pad approach. I got sick of waking up multiple times during the night after rolling off my Thermarest. Packed down nice and small which is always a plus.

Does this bag come with a compression...

Posted on

Does this bag come with a compression sack?

Best Answer Responded on

Yes, it comes with a nylon stuff sack and mesh storage bag.

Responded on

I purchased a Granite Gear Air Compressor Sack 11L (GRG3291) to replace what came with the bag from Big Agnes (more storage than compression). It allowed me to really compress this puppy down. Fit nice and snug at the bottom of my backpack.

What is the recommend washing technique ...

Posted on

What is the recommend washing technique for treated down bags such as this one.

Responded on

Hey Michael,

According to BIg Agnes, you would treat it the same as washing your regular down bag. In fact, you may find you won't need to wash it as often since Big Agnes claims that DownTek retains its loft better over time than traditional down.

Here are the washing instructions provided by BA:

5 5

Really solid bag

  • Gender: Male

This is such a great bag for the price. It's fairly light, and will pack down to a decent size too.
As far as performance, I've slept in temps from 15-60 and have been plenty comfortable. Matched with the insulated sleeping pad, you always stay attached to your sleeping pad so rolling off in the middle of the night is no longer a concern.
I haven't experienced any significant loss of feathers after a few years and this bag is still working like a charm