The Big Agnes Lost Ranger is a 15 degree down sleeping bag with winter temperature ratings that packs a lot of warmth for its weight. The 650 fill duck down keeps weight down while keeping affordability in mind.
Picking a winter sleeping bag can be a confusing operation.
Coming in under 3lb’s, the Big Agnes Lost Ranger checks a lot of boxes for us looking for a cheap, mid-weight, winter sleeping that can easily fit into your pack.
Big Agnes Lost Ranger 15 Sleeping Bag
Pros
- Simply Roomy – big? – side sleeper? no problem.
- Packable / Good compression
- Very light for its warmth
- Quality construction
- Good zipper
- Affordable
- Works well with a NeoAir
- Closer to a 10 degree bag warmth wise
- Built-in external sleeve for a sleeping pad
Cons
- Requires sleeping pad to be effective (usually not an issue)
- Bellowing effect when you move your legs can sometimes pull in cold air
- Some cold Cold spots
- Collar sometimes gets in the way
- Not the best for those who roll around in their sleep
Feature Summary
- 650 fill-power DownTek insulation absorbs 30{6ae4d48c96d66710345507933be5e8d0ff05184660bc2c1189ea28c61d96508c} less water and dries 60{6ae4d48c96d66710345507933be5e8d0ff05184660bc2c1189ea28c61d96508c} faster than untreated down, and retains significantly more loft than untreated down after exposure to moisture
- An external built in sleeve design keeps your sleeping pad layer next to your body for more efficient heat distribution and reducing drafts.
- Ripstop shell fabric is soft and does have a DWR finish to reduce issues from splash
- Low-profile cordlock lets you un-cinch the hood with just one hand
- Tapered, vaulted footbox creates wiggle room for your feet without creating large cold air pockets
- Stretch fabric panel beneath hood creates a designated pillow pocket
- 70″ zipper (almost full length)
- Left and right pair of sleeping bag zippers can be joined
- Includes a mesh storage sack and nylon stuff sack
External Sleeping Pad Sleeve
Warmth
The Lost Ranger uses 16oz of 650fp treated goose down. Rated to 15f by the amount down can actually be taken down to 10f safely with a proper sleeping pad and some thermals.
Weight
At 2 lbs, 12 oz, this sleeping bag isn’t the lightest winter sleeping bag on the market but compared to other 15f or probably better compared to 10f bags it actually holds its own.
Comfort & Sizing
Big Agnes seems to follow a pattern of catering to the bulkier guys and the Lost Ranger is no different. Roomy in a word. Even the regular fits up to 70 inches of shoulder room. That’s roomy even for a stocky 6foot gut like me.
The almost rectangular shape of this sleeping bag also adds much needed comfort levels for those that can’t lie still at night or sleep on their side.
While the sleeping pad sleeve makes up for the non mummy shape, its a bit of a pain for those who roll around a lot.
Because of the large opening, entry and exit are very easy in the dark of night.
Big Agnes Lost Ranger Packed Size
The 650 fill allows the Lost Ranger to pack down relatively small, actually surprisingly small for a 15f sleeping bag. I have a 900fp 20f sleeping bag that only packs down a little bit smaller.
Durability
Big Agnes has solid QA & Testing practices to ensure their products hold up to the harsh environments you plan to put this bag through.
Big Agnes Lost Ranger vs Encampment
The Big Agnes Encampment is the Synthetic insulated version of the Lost Ranger. The sleeping bag design (including sleeping pad sleeve) is the same. The only real difference is in the insulation type. With Down you have better compression and less weight for an easier carry. For most climates and conditions it can be advised to go with the Down version as keeping your down sleeping bag dry is actually pretty easy these days. For extremely damp or snowy climates like parts of Canada, Australia, and New Zealand it can be a smart choice to go with a synthetic option like the Encampment.
Less of a deciding factor but worth a mention is that down tends to breath easier and synthetics tend to feel clammy.
The Verdict
Perhaps a gimmick, the sleeping pad sleeve makes a big difference in warmth for those cold sleepers out there needing a little extra protection. Personally I wouldn’t hold sleeping bag as my go-to – I’m a serial side, stomach, curled up and roll around sleeper that wouldn’t find this comfortable for nights on end.
While holding that opinion, the warmth, the packability, and the roominess makes this a unique unmatched sleeping experience for the bigger body types like myself.
Frequently Asked Questions
Will regular be too short for someone who’s 6 foot?
Regular will fit you perfectly. Any taller and I would suggest getting the long.
What pad do I need for my big agnes lost ranger long sleeping bag? Or can I just use a standard rectangular foam pad I have? Does the thickness of the pad matter?
The regular fits a pad that measures 20x72x4.25″, the long fits a pad up to 20x78x4.25″, while the long wide fits a pad up to 25x78x4.25″. Most sleeping pads (including inflatable) will fit this bag.
Is it possible to zip two of these together?
Two Big Agnes Lost Ranger sleeping bags can be zipped together provided you have both a left and a right zip version. The Big Agnes Roxy Ann (womens version of this bag) is also compatible.
Specs
| Best Use | Backpacking |
|---|---|
| Temperature Rating (F) | 15 degrees Fahrenheit |
| Temperature Rating (C) | -9 degrees Celsius |
| Weight |
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| Shell | Ripstop polyester |
| Zipper Location | Left |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 650-fill DownTek down |
| Fill Weight |
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| Lining | Polyester taffeta |
| Sleeping Bag Shape | Semirectangular |
| Fits Up To (in.) |
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| Shoulder Girth (in.) |
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| Hip Girth (in.) |
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| Stuff Sack Size |
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| Stuff Sack Volume |
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| Compressed Volume |
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| Gender | Unisex |