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Sea To Summit
Flame FmIV Sleeping Bag: 15F Down - Women's

4.642857142857143 out of 5 stars
56 Reviews

Out of Stock

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Flame FmIV Sleeping Bag: 15 Degree Down

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

Overall Rating

4.5 based on 56 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 9 reviews
5 Stars - 44 reviews

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5 out of 5 stars

March 15, 2024

Comfortable and warm

[This review was collected as part of a promotion.] This is the only sleeping bag made of artificial material that I've ever found comfortable. It's not too slippery or noisy, and it's very warm. It immediately fluffs up really well. And it's shockingly lightweight for its loft. 100% recommend.

Darcie B.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

March 14, 2024

Excellent balance of warm and lightweight

[This review was collected as part of a promotion.] I bought this for a mild winter backpacking trip. For 3 seasons I have preferred a quilt and layers of clothing but I needed something warmer for winter and early spring/late fall. I am a back sleeper who struggles in the confines of a traditional mummy, yet I carry extra sleeping bags, food, and occasionally water for my dogs so I don't have weight to spare. This bag was wide enough that I didn't feel trapped while very lightweight and warm.

Will R.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

February 6, 2024

Flame Ultralight Sleeping Bag

[This review was collected as part of a promotion.] This is the best sleeping bag I have ever bought. It is very affordable, great looking and packs up amazingly small and light. I love it!

Solon R.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

January 18, 2024

Cozy lightweight bag with enough

[This review was collected as part of a promotion.] Cozy lightweight bag with enough wiggle room for me and my little dog that snuggles in next to me!

Jeanne W.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

January 4, 2024

Zipper came off 1st zip...yikes.

[This review was collected as part of a promotion.] Zipper came off 1st zip...yikes. but got it back on. Slept great in 30 degree weather overnight ...in prep for steelhead fishing in Erie Pa. Roomy enough for a side sleeper, that's me :)! Warm and snuggled especially important for a raynauds sufferer. 1st trial in the bag was great! Next adventure...Appalachian trail!

Stacey S.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

November 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.

Trish L.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

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.

Enrique A.
Sea to Summit

Originally reviewed on Sea to Summit

1 out of 5 stars

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!

Kathrin
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

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!

Stacy M.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

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.

Patricia O.
Sea to Summit

Originally reviewed on Sea to Summit