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Big Agnes
Blue Lake Sleeping Bag: 25F Synthetic - Women's

5 out of 5 stars
2 Reviews

Out of Stock

Don't worry though, we have a lot more Synthetic Sleeping Bags in stock than that.

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Blue Lake Sleeping Bag

When those early winter weekends call to you, add the 25-degree Blue Lake sleeping bag from Big Agnes to your pack. Weighing in under 3lb, this sleeping bag sheds grams—not to mention saves space—so you can throw in an extra liter of water or a thermal liner for cooler temps. If temperatures do fall and inclement weather insues, hydrophobic synthetic fibers help keep you warm if your tent leaks or you wake up snuggling the condensation-laiden sidewall of your tent. You can also leave the tent at home to enjoy uninterrupted nighttime views while abrasion resistant material protects the bag from tears on twigs or rocks.


  • Mummy sleeping bag for backpacking and camping
  • 25-degree rating signals adventure after the leaves change
  • Light enough for trips deep into the wilderness
  • Nylon ripstop prevents minor tears when sleeping under the stars
  • Synthetic insulation holds heat when wet
  • Fit specific for the contours of women’s bodies
  • Item #BAG00FK
[face fabric] nylon ripstop, [lining] polyester taffeta
Fireline Pro (synthetic)
two way
Max User Height
[regular] 5ft 10in, [petite] 5ft 5in
Shoulder Circumference
[regular] 56in, [petite] 54in
Hip Circumference
[regular] 56in, [petite] 54in
Foot Circumference
[regular] 36in, [petite] 34in
Bag Length
[regular] 5ft 10in, [petite] 5ft 5in
Draft Tube
collar, zipper
Pad Retainer
Fill Weight
[regular] 2lb 2oz, [petite] 1lb 13oz
Storage Sack
Stuff Sack
Stuff Size
9 X 20in
Claimed Weight
[regular] 2lb 14oz, [petite] 2lb 11oz
Manufacturer Warranty

Overall Rating

5 based on 2 ratings

Review Summary

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

Fits True To Size

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5 out of 5 stars

August 30, 2021

Very warm sleeping bag!

I've used it once or twice and have initial impressions
Size Bought:
5' 8"

This was definitely the warmest sleeping bag I have ever slept in. Very comfortable very lightweight and easy to backpack in. LOVE!

Hannah K
5 out of 5 stars

March 21, 2021

Amazing Bag

I've put it through the wringer
5' 10"

My wife and I have owned these Big Agnes mummy bags for a few years now and we sleep in them every night during the winter. They are amazing. Like sleeping in a cloud. It gets below 20° here in the mountains of WNC and we stay nice and warm in these bags. But that?s not all. What prompted me to write this review was what happened today. I was drilling into a piece of wood when the drill bit ate thru the piece and twisted into the mummy bag. I reversed the drill and, amazingly, no hole! The material held strong, this bag is incredible and very well built, very high quality!