How to Choose Sleeping Bags for Backpacking
Big Agnes Lost Ranger UL 3N1 0 System Sleeping Bag
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With a modular design that offers 3 bag configurations in one simple-yet-technical sleep system, the Big Agnes Lost Ranger UL 3N1 0 sleeping bag is perfect for 3-season camping and backpacking.
Shop similar productsKey Details
Fill
850-fill-power DownTek
Temperature Rating (F)
20 degrees (F)
45 degrees (F)
0 degrees (F)
- Offers 3 bag configurations for temperature versatility with a technical, roomy sleeping space
- Inner bag offers standalone comfort in 20–35°F conditions—the perfect bag to take along on hut trips, back-of-the-truck adventures or couchsurfing on your way to fun
- Outer bag offers standalone comfort in 45–50°F conditions—a packable yet lofty option for warm nights backpacking, bikepacking or packrafting
- Combine the inner and outer bags to create a temperature-controlled sleep space for trips with variable conditions, down to 0–15°F
- Modular, ultralight bag design stays attached to your sleeping pad, so you won't roll off in the middle of the night
- Ultralight, durable materials with 850-fill-power Downtekâ„¢ water-repellent down, for those who aren't willing to sacrifice comfort for compressibility
- Insotect Flowâ„¢ vertical baffles contour to your body to provide a more comfortable fit and keep you warmer
- Maximum thermal efficiency is achieved when inner and outer bags are layered, using offset quilted construction to minimize cold spots
- Sleep on either side using the inner bag alone or within the outer bag; 3/4-length, anti-snag ambidextrous zipper stays out of the way when side sleeping
- Inner bag design mimics the award-winning Sidewinder sleeping bag, designed for side sleepers and made to move with you from side to side
- Keep your head snug and warm using the inner bag with jacket-style hood
- Spacious, rectangular-shaped outer bag is constructed with a no-draft collar, no-draft wedge and 2 no-draft, anti-snag, dual side zippers with zipper garages
- Hand-tuck pockets at the top of the outer bag provide additional hand warmth
- 2-way zippers at both the top and bottom of the inner and outer bags allow easy temperature control throughout the night
- Easy access to the discreet pillow barn on the pad sleeve keeps your pillow tucked in all night
- Shell, lining and pad sleeve made with ultralight ripstop nylon
- Pad Cinch System adjusts to a variety of pad sizes; a self-equalizing drawstring easily connects the bag to the pad, and the middle securement feature provides extra stability
- Storage sack and stuff sack included
Imported.
View all Big Agnes Backpacking Sleeping Bags| Best Use | Backpacking |
|---|---|
| Temperature Rating (F) | 20 degrees (F) 45 degrees (F) 0 degrees (F) |
| Temperature Rating (C) | -7 degrees (C) 7 degrees (C) -18 degrees (C) |
| Ultralight | Yes |
| Shell | Ultralight ripstop nylon |
| Zipper Location | Left/Right |
| Insulation Type | Down |
| Water-Resistant Down | Yes |
| Fill | 850-fill-power DownTek |
| Sleeping Capacity | 1-person |
| Lining | Ultralight ripstop nylon |
| Sleeping Bag Shape | Semirectangular |
| Stuff Sack Size | 20 x 9 inches |
| Stuff Sack Volume | 20.9 liters |
| Gender | Unisex |
| Sustainability | Contains recycled materials |
Buying Advice
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Ahzarel
Indiana
The setup I'll be using for the rest of my life
1 year ago
This bag is excellent. As a side sleeper that needs to flip several times during the night, the bag-within-a-bag and pillow pocket was revolutionary; the back of my head can always stay in the bag, my mouth is never obstructed, the pillow is always where it should be and I'm not sliding off of the pad or getting twisted up in the bag. Compressibility with the included stuff sack is fine for a 65-liter or larger pack - if you need it smaller just get a compression sack and it'll squish down nicely. Weight of this is great and the flexibility of using only one of the bags for warmer weather is a nice bonus. I found the warmth rating to be accurate compared to the other bags I have used. I took this on my last ascent of Mt. Whitney and it's now my go-to setup. This was the best sleep I've ever had not in a bed and the system that I'll be using for the rest of my life.
Age:35–44
Yes , I recommend this product
Jane
Love it but….
1 year ago
I bought this combo 1.5 years ago ,have used it a lot, and it is the best bag(s) I’ve ever had. I have used both bags separately, which is great for summer (outside bag) and warmer shoulder seasons (side sleeper bag), but not together yet. I’ve been a little cold in the inner bag for several nights at 32oF, around my shoulders and hips ,but I’m a cold sleeper and my pad had partially deflated. They are light, comfortable material, and i love that i can stick my feet out of the bag when they get too hot. My feet have never been cold, nor my head. I’m a side sleeper who shifts around a lot, and the innovative inner bad moves with me, instead of twisting around, as has always been my previous experience. I love the zipper up my front of the inner bag and it is well insulated with a flap. The hood is super warm and comfy with a terrific design. I have two reservations. 1. My most used inner bag has had 2 seams separate ( no tears in the fabric), and i intend to ask the company to repair or replace, as this is poor manufacturing not a use problem. 2. The fabric has a wonderful feel and is very lightweight, but does get caught in the zipper, which requires care and some frustration. The latter is a small cost for how happy I’ve been with this Lone Ranger. The former requires remediation. I love the old teal color I have too.
DoubleFPhil
Ohio
It's so big
1 year ago
It's warm, it's light, but it packs down so large that it takes up most of the space in my backpack. It feels like I can squish it down with extra force, but the provided sack doesn't have any way to compress it. For the price and size, it's not a great backpacking sleeping bag.
Age:35–44
No, I do not recommend this product
Some dude
Pricey, but it delivers.
8 months ago
When I first looked at the Lost Ranger, I was fairly dubious of its claim that it would be warm down to 0 degrees F. Both the top quilt and the mummy bag are fairly lightweight, and they feel a little under-stuffed. But I spent the night in it, in single-digit conditions with no base layer or liner, and I was pleasantly surprised at how well it performed. Inside a two person winter tent, I wasn't too hot or too cold, even as snow storm blew in overnight. I'm not sure that the Lost Ranger would be suitable for temps much below 0, but of course, it's not claiming that it would be. The top quilt is pretty great. The long version fits snugly over my Exped Downmat Long/Wide pad. The bottom of the quilt is a sheet that wraps around the top of the sleeping pad to keep drafts out, and it sport an extremely handy pillow pocket at the top. You can really toss and turn in this thing without pulling cold air in from the sides or having your pillow squirt out from under your head. The zipper runs only along the left side of the quilt, which is something that you have to keep in mind when putting it against a wall in your tent. The mummy bag is less impressive. It's cut nice and wide at the shoulders, which is something I appreciate in a mummy. However, it uses a center zip, which I've always found inconvenient and hard to zip/unzip in the middle of the night. It also lacks a cinch cord around the hood, and my face ended up a bit chilled as a result. There's enough room inside the top quilt to cover my face, but then condensation from my breath started wetting it down. It's a really disappointing oversight in what is otherwise a pretty well thought-out sleep system. Other than the lack of a cinch for the hood, my only real complaint about the Lost Ranger is its price. $600 is an awful lot to spend on a 3-season setup, especially if you already own a mummy bag. They do go on sale pretty frequently, but I wish BA would just sell the top quilt separately. I intend to continue using the Lost Ranger's quilt with a different mummy bag.
Age:45–54
Yes , I recommend this product
Anonymous
7 months ago