Flame FmIV Sleeping Bag: 15F Down - Women's
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Ultralight backpacking trips in the high alpine or during shoulder seasons call for the Sea to Summit Flame FmIV Sleeping Bag. It's stuffed with Ultra-Dry Down 850+ to insulate and keep you warm even when moisture is present. Its fully baffled design and body-mapped down is designed to maximize warmth to keep you comfortable in low temperatures. The bag's mummy shape helps with this as well and is wider at the hips and knees so you can sleep in a natural position without creating cold spots. The down and the bag's shell keep it highly compressible as well to easily pack into the included lightweight Ultra-Sil compression bag to fit comfortably in your backpack.
Details
- 3-season bag that packs easily for ultra-light backpacking trips
- Mummy shape provides thermal efficiency for warmer sleep
- Ultra-Dry Down provides insulation when moisture is present
- Lightweight nylon shell is compressible for easy packing
- Fully baffled design, body mapping maximizes warmth on cold nights
- Wider hips, knees allow natural sleep position without cold spots
- Ultra-Sil compression bag and storage cell contain the sleeping bag
- Item #STS006P
- Material
- [face fabric] 10D nylon, [lining] 7D nylon
- Insulation
- RDS certified 850+ Ultra-Dry Down
- Shape
- mummy
- Zipper
- full-length
- Max User Height
- [regular] 5ft 7in, [long] 5ft 10in
- Shoulder Circumference
- [regular] 59in, [long] 61in
- Hip Circumference
- [regular] 56in, [long] 58in
- Foot Circumference
- [regular] 35.5in, [long] 38in
- Bag Length
- [regular] 5ft 7in, [long] 6ft
- Draft Tube
- yes
- Pockets
- none
- Pad Retainer
- no
- Fill Weight
- [regular] 1lb 6.9oz, [long] 1lb 9.7oz
- Degree
- 15F
- Storage Sack
- storage cell
- Stuff Sack
- Ultra-Sil compression bag
- Stuff Size
- 18.5 x 13 x 8.5in
- Claimed Weight
- [regular] 1lb 15.4oz, [long] 2lb 3.1oz
- Manufacturer Warranty
- lifetime
Reviews
Q&A
Overall Rating
4.5 based on 51 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageNovember 9, 2023
Cozy
[This review was collected as part of a promotion.] Kept me warm and was easy to sleep sideways. My zipper did get stuck on night 4 and my bag tore. Thankfully, a friend had a repair patch.
Originally reviewed on Sea to Summit
September 18, 2023
Is a great prduct. I’ve
[This review was collected as part of a promotion.] Is a great prduct. I’ve just bought it for my 12 years daughter, and she’s so happy with it, easy to keep, light and really warm.
Originally reviewed on Sea to Summit
September 15, 2023
Miserable sleeping bag
I bought the Flame 3 sleeping bag, comfort temperature -4°C for backpacking in the summer: I spent a month in the Swiss and Slovenian Alps (June/July) and a month in Iceland (August). Every single night that was below 10°C I froze in this sleeping bag. I had to use the silk sleeping bag, wear Merino underwear and usually also the down jacket so that I could sleep. This was truly the worst purchase of my life. I have a Marmot sleeping bag with a comfort temperature of -4°C in which I have never felt cold, even at sub-zero temperatures. These sleeping bags are two different worlds. I would not recommend this Flame 3 sleeping bag!
Originally reviewed on Sea to Summit
September 8, 2023
Very lightweight for backpacking! I
[This review was collected as part of a promotion.] Very lightweight for backpacking! I also love that it comes with (2) separate bags for storage!
Originally reviewed on Sea to Summit
August 28, 2023
Featherlight and Cozy
Incredibly light and warm. I bought the 25°F / -4°C version and use it with a fleece liner both as an extra layer of warmth and to keep the inside clean. Since I tend to sleep cold, I will still wear warm layered clothes inside the bag when the temperature goes below freezing.
Originally reviewed on Sea to Summit
August 9, 2023
15 degree bag super warm
[This review was collected as part of a promotion.] I found this bag to be super warm in the mountains, though it was not 15 degrees out. Worried about running cold, I actually ran hot the first few nights in this bag when the temps were higher, and wished I had gotten the lighter bag- I was sweating and the fabric was not doing me any favors. Then when it got cooler, I was very cozy in this bag (with no liner); I didn't even need long johns. Was happy then that I got the 15 degree, though I don't have a comparison with the lighter bag. Maybe it also would have been fine. In short, I recommend this bag and was not at all worried about being cold. Its super lightweight and very easy to pack up.I was able to use the zipper with some care, it was fine. As I am small (5.1 and 90 lbs) I had lots of room to move around and was not cramped in the least. I didn't have to deal with moisture issues on this trip, so cannot speak to that. Hope it will last me a very long time. If you are in need of a lightweight quality bag that will keep you warm in cold temps, this is the one.
Originally reviewed on Sea to Summit
August 3, 2023
took this a 3-day backpacking
[This review was collected as part of a promotion.] took this a 3-day backpacking trip, super super happy, very light weight and warm!!
Originally reviewed on Sea to Summit
June 21, 2023
great fit. light weight. can't
[This review was collected as part of a promotion.] great fit. light weight. can't wait to put it to the test on the trail.
Originally reviewed on Sea to Summit
June 1, 2023
Bought this 35 degree bag
[This review was collected as part of a promotion.] Bought this 35 degree bag to replace a very old 40 degree unisex bag that wasn’t ever very warm. Used the Flame for 2 nights when temp went to ~43 degrees and slept warm with the zipper open and my head bare most of both nights—so, this bag is warm. It fits 5’ me perfectly with plenty of room to sleep on either side or on my back + I love the extra fill in the foot box. I was also worried about the 10D shell and 7D liner with my 37# energetic dog sharing the tent—so far, no problems. I would prefer a full-length zipper so that it would have more versatility for use on warmer backpacks or thru hikes. I sleep cold but also have occasional hot flashes so the short zipper was almost a deal breaker. I will have to purchase a light-weight quilt for warmer hikes. I tried, but did not have the hand strength to compress the bag entirely into the tiny compression sack provided. I used a larger waterproof sack and compressed it further by stuffing other things into my pack on top of it. I also thought the storage sack was too small and bought a large cotton storage sack to use instead.
Originally reviewed on Sea to Summit
March 14, 2023
Comfy and nice!
[This review was collected as part of a promotion.] I bought the 15° bag. Used it two times in my backyard to double check temps before going to Grand Canyon (cold on the rim!) It is comfy and warm. I found it went to 30° comfortably for me. I added the down liner for colder temps, which worked down to 15° or so, with just a few cold toes (on a mat with 7+ r value), could go lower and maybe be a bit chilly. I am 5'7" /130 and decided on the long. I tried both, was really on the fence. I think I should have stuck with the regular, BUT I will say I can bring my knees all the way up in the long and that is surprising and pretty cool! It is lightweight and packs small. It's bigger than a water bottle tbh but not huge still, esp for a bag this warm. I would have liked the baffle to be bigger around my shoulders but it works well enough. Zipper works great, no issues. The cinch for the hood is fine, little fussy to undo, esp if just loosening one side, but still not a big deal. Def recommend if you have the money. For the size and weight, it's a good product if you have the money.
Originally reviewed on Sea to Summit
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