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  • Big Agnes - Lost Ranger Sleeping Bag: 15 Degree Down - Blue
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  • Big Agnes - Lost Ranger Sleeping Bag: 15 Degree Down - Blue

Big Agnes Lost Ranger Sleeping Bag: 15 Degree Down

$249.95 - $299.95

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    • Blue

    11 Reviews


    Almost better than home.

    Although light and compact enough to take on backpacking trips, the Big Agnes Lost Ranger 15 Degree Down Sleeping Bag delivers comfort that will make you feel like you're in your bed back home. Its spacious and warmth-enhancing design keeps you tucked away in supreme comfort when you're car camping on a quick getaway or spending multiple days on the trail.

    Flow Construction uses a revolutionary baffle design to eliminate insulation shifting and deliver uniform heat distribution to ensure consistent warmth throughout the night. Down keeps the bag light and compressible enough for backpacking without sacrificing warmth in the process. The down is treated with DownTek to protect it from loft-compromising moisture. Just to be safe, the soft and smooth fabric is treated with a DWR coating to repel any wayward water droplets.

    A full-length pad sleeve keeps your sleeping pad from shifting throughout the night, and it maximizes thermal efficiency by protecting you from the frozen ground. Big Agnes also included an integrated pillow pocket to keep your camp pillow in place, and you can even stuff it with spare layers when you really want to go minimalist. The vaulted, tapered footbox gives your toes room to wiggle without creating large cold air pockets.

    • Trail-worthy weight meets home-like comfort
    • Sculpted contour improves insulation performance
    • 650-fill down offers excellent warmth-to-weight ratio
    • Integrated pad sleeve keeps sleeping pad in place
    • Free Range hood lets you lift head without adjustment
    • Left- and right-zip bags can be mated together
    • Interior fabric loops for sleeping bag liners
    • Big Agnes products are inspired by their home in the Rockies
    • Item #BAG00A4

    Tech Specs

    mini ripstop polyester microfiber with DWR finish, [lining] polyester taffeta
    650-fill DownTek
    Max User Height
    [regular] 5ft 10in, [long / long x-wide] 6ft 6in
    Shoulder Circumference
    [regular] 70in, [long] 73in, [long x-wide] 75in
    Hip Circumference
    [regular] 65in, [long] 68in, [long x-wide] 80.5in
    Foot Circumference
    [regular / long] 53in, [long x-wide] 64in
    Draft Tube
    Pad Retainer
    [regular] 20 x 72in, [long] 20 x 72in, [long x-wide] 25 x 78in
    Storage Sack
    Stuff Sack
    Stuff Size
    [regular / long] 8 x 17.5in, [long x-wide] 9 x 20in, [compressed regular] 8 x 7.5in, [compressed long] 8 x 8.5in, [compressed long x-wide] 10 x 10in
    Claimed Weight
    [regular] 2lb 15oz, [long] 3lb 5oz, [long x-wide] 3lb 9oz
    Recommended Use
    backpacking, camping
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Got what I paid for

    • Familiarity: I've used it several times

    I researched similar sleeping bags for a long time and settled on the Lost Ranger 15 degree bag. I cannot say that I am disappointed in this bag, but I am not blown away by it either. The price of the bag was more palatable to me than higher end bags. The bag does stuff down well and is very packable. I like the sleeve for the sleeping pad. That is a nice feature so that a person does not have to wrestle with the pad all night. To me the short-coming is the 15 degree rating is generous. I have used this bag in the backcountry during the fall and spring with normal low temperatures in the upper 20’s. I am not a cold natured person, but the nights have been cool in this bag. I would expect temperatures much cooler than this to make for a long night.

    Great Product!

      This is a well made bag, and I purchased it mostly for summer use in the high mountains, where it gets "coldish" at night...but not extreme cold. I also was happy that the bag is big and lofty since I'm a tall fella and enjoy room to move about inside the bag. Obviously this makes it less useful as an extreme weather "mummy" bag but that's ok with me. Only thing I didn't like is that you basically "have to" buy the sleeping pad for it since the bottom has little fill. This wasn't very clear to me before purchasing, something Backcountry might look into.

      Sleep System = Good Sleep

        When paired with the Big Agnes pad this sleeping bag is amazing!!!! Do yourself a favor and get them together. I tend to roll around in my sleep a lot. With a typical sleeping bag on top of a pad I end up in a knot off the side of the pad. Not with this system. With the sleeping pad in the sleeve under the sleeping bag I am able to roll around all night long, like I would in my bed at home without getting tied into a knot or ending up off the side of the mat.

        Great 3 Season Bag

        • Familiarity: I've put it through the wringer

        I slept in this bag almost every night from March - October when I was guiding for a wilderness therapy company here in Utah. It got a little warm during the summer when the night time temps didn't sink below 70 but that should be expected for a 15 degree bag. Otherwise worked great all the way down to 20 degree temps. Once it got colder than that I switched to my winter bag. I love the sleeve for the sleeping pad. It cuts down on unnecessary insulation and makes the bag lighter and more compressible, keeps you from rolling off in the night and ensures that you're insulated from the ground. I've had the bag for almost 4 years now with one year of heavy use some where in the middle of that time frame and it's still going strong! Love it!

        Compact and comfortable.

        • Familiarity: I've used it several times

        This is my first down bag. I was amazed how thick it became after it was unpacked. I was only in 40 degree Fahrenheit weather and I was able to easily stay "toasty" warm. It rolls up easily and is much more compact than my last bag. Easy to zip as well.

        Best Sleeping bag experience

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

        Super roomy, stayed on the pad, didn’t tie the bag in a knot as I rolled around. Best sleeping bag experience I have ever had.

        So amazingly warm

          I purchased this bag since it was wider than most and still light enough to go backpacking long hauls with. It's amazingly warm as well. Loved the warm and comfort. I'll probably purchase another.


          • Familiarity: I gave it as a gift but have feedback to share

          Rated at a 15 degree sleeping bag, this is a trusty choice when temps drop that low. It is a down bag so your warmth to weight ratio is much better than a synthetic sleeping bag. I love the feature of having your sleeping pad slide right into the bottom of the bag so you don't slide off your pad all night long. I'd recommend this to anyone looking for a cold weather sleeping bag with a value.

          Keep it in the truck

          • Familiarity: I've used it several times

          Snagged this bag for my "overall" camp setup and it's great. I keep it in the truck for winter nights in the desert and can just as easily pack it up for a weekend in the high country. Plenty light, warm and packs nice and tight.

          Big Fan

          • Familiarity: I've used it several times

          I really enjoy this bag as a good 3 season bag. I've used it spring fall and winter camping and it has done a great job all three times. (I also have used it while crashing at some college buddies houses and apartments when couches are full after parties)

          I sleep very hot so I leave the top of it cracked open a decent bit so that I don't sweat too much as I begin to fall asleep and then if I get chilly I don't even waste my energy opening my eyes to zip up the bag.

          I'm 5'9 and I went with the regular / left zip, fits great. This paired with the BA Q-Core SL Rectangluar Pad has done wonders for me while sleeping at night. The sleeve in the rear of the bag does a great job keeping a BA pad in place preventing you from rolling off. The Q-core SL has an R value of 5 so it pairs well with this bag due to the fact that there is no insullation on the back of the bag to save space.

          Zipper has only snagged a few times on me and never ripped any thing. Definetly a great pick up!

          Big Agnes Classic Series Down Bags

          Big Agnes Classic Down series offer warmth, compressibility and the Big Agnes System bag design. Classic Series bags combine a roomier contour shape with a narrower pad sleeve to provide an overall more comfortable and cozier sleeping experience than ever before. We’ve also redesigned the bag to be taller across the top so you can roll over more freely. The ergonomic hood gives you more range of motion so that you can move unrestricted while staying hooded. (note: prior year colors shown in video)

          My Customer's Experience

          • Familiarity: I've used it several times

          Used this bag for 5 nights in the Andes. Temps got down to about 23 F and -5C at night. I have to say the bag wasn't suitable for me at those temps. My feet were the coldest. My back was comfy, thanks to the Big Agnes Double Z pad!

          My Customer's Experience

          I hear you, I have an older Summit Park 15-Degree and if it gets below 40 I start getting very cold. I have even used a bag liner with it and it was still cold in the early morning hours. I hate trying to sleep cold and then waking up cold!