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Sea To Summit
Flame II Ultralight Sleeping Bag: 35F Down - Women's

4.642857142857143 out of 5 stars
56 Reviews

Out of Stock

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Flame II Sleeping Bag

Cold shoulder season nights won't hold a candle to the Flame II Sleeping Bag from Sea to Summit, the no-frill technical sleeping bag rated for 35F nights in the back- or front-country. The mummy shape of this bag contours specifically to the female body, with extra space given in the hips for a more comfortable sleeping experience. For added warmth, the baffles are largest in the mid-section and sewn through below so you retain warmth where you need it most. The 1/3 zipper helps reduce weight while also providing ventilation for warmer summer nights when it's not quite warm enough to sleep on top of your bag.


Details

  • 3-season sleeping bag to stay warm in the shoulder season
  • Comfortable rating for freezing temps to high 60s
  • Baffles in torso keep your midsection most cozy
  • Shorter overall length reduces unnecessary weight
  • Third-length zip gives you ventilation in warmer months
  • Wider shape in hips grants natural sleeping position
  • Item #STS006N
Material
10D nylon
Insulation
down
Shape
mummy
Zipper
YKK #3 full-length
Max User Height
[regular] 5ft 7in, [long] 5ft 10in
Bag Length
[regular] 67in, [long] 70in
Fill Weight
[regular] 10.9oz, [long] 12.5oz
Degree
35F
Stuff Sack
Ultra-Sil
Stuff Size
2.9L
Claimed Weight
[regular] 1lb 1.8oz, [long] 1lb 4.3oz
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