• Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Grape/Navy
    Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Side
    Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Front
  • Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Grape/Navy
  • Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Side
  • Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women's - Front
Big Agnes - Mirror Lake Sleeping Bag: 20 Degree Down - Women'sView Larger Image

Big Agnes Mirror Lake Sleeping Bag: 20 Degree Down - Women's

30% Off
from $139.96 $209.95

Item #BAG007C


Select options
  • Petite/Right Zip
  • Reg/Right Zip

For backpackers on a budget.

The Big Agnes Women's Mirror Lake Sleeping Bag offers innovative insulation at a price that won't bust your bank. Down insulation ensures lofty warmth without the weight, as well as the compact convenience that backpackers need. Big Agnes treated the down with DownTek to retain its lofty warmth in moisture-riddled environments, and the shell has a water-resistant treatment to shed liquids for even more protection.

Big Agnes styled the Mirror Lake with a weight-saving mummy shape, and the contoured hood has a drawcord to ensure a snug fit as well. There are draft tubes around the collar and inside the full-length zipper to seal out winds. This sleeping bag also has internal loops for liners, and external loops for airing out. Big Agnes included a stuff sack for inside your pack and a storage sack for the garage.

  • 20F degree temperature rating
  • 600-fill DownTek water-repellent insulation
  • Water-resistant shell
  • Contoured hood with drawcord and cord lock
  • Full-length zipper
  • Draft collar and zipper
  • Internal liner loops
  • External hanging loops
  • Mesh storage sack and nylon stuff sack
  • Reviews
  • Q & A

Overall satisfied, but...

  • Familiarity: I've put it through the wringer

I went hiking/hitchhiking through The Outer Hebridges in Scotland with this bag for about a month. It kept me (mostly) warm and dry!. So score for that one!
I got this bag because I tend to be quite cold, and last time I went hiking in Scotland I was not prepared for how cold it actually gets even during summer, so this bag seemed like the answer to that.
I really wanted to love it, and it is a great bag - don't get me wrong - I also won't buying a new one, until this one's used up. I just wouldn't buy it again.
My biggest issue is the size when it packs down. It has no compression straps on the pack, so I feel like it's huge! It was over double the size of my tent! The no compression straps on the side also made it quite difficult to strap to the outer side of my backpack.
In regard to the warmth it kept my feet toasty warm, but my upper body got cold pretty quickly. I woke up twice because of freezing (feet still toasty warm though). I didn't have a thermometer, but it wasn't freezing outside. The solution to this was to wear my fleece on top of my wool baselayer.
On the warmer days I unzipped it and used it as a duvet - which worked really well! :D
So overall an okay bag. And if you go to places that don't get too cold for too long it's awesome!

Love it

  • Familiarity: I've used it several times

I bought this sleeping bag for a southern Africa safari trip. We travelled in August, when temperatures can drop to 5-10 degrees Celsius at night. This bag kept me cozy on those cooler nights, while it was not too hot on warmer nights where temperatures stayed in the 20s. Soft material and light weight. Fit well in my 63L pack's lower compartment. Worth the price.

Great product, right price

  • Familiarity: I've used it several times

My girlfriend was in dire need of a new sleeping bag and the hunt was on for the right one. What drew me to the Mirror Lake 20 degree from Big Agnes was the length of the bag. My girlfriend is 5'7" and most regular length bags for women suggested max height at 5'6". Then, the long bags were recommended for heights to 6'. I looked through countless bags for one longer than 5'6" without an extra 6" of room. After reading the reviews below, I have this bag a shot and length-wise, it is perfect! The fit and finish of the bag is nice but not over the top, the fabric is a little more stuff and crinkly than other bags I've used but that is only a comparison, not a downside. The neck flap is great for her when she is snuggling up and the 20 degree rating will work for trips year round with the ability to unzip and ventilate her feet. I'm usually convincing myself to buy more expensive and more advanced gear but this bag will do a great job without breaking the bank.

Unanswered Question

What is the shell material on this sleeping bag?

Big Agnes Traditional Down Mummy

Our traditional down mummy bags deliver high value and performance in a lightweight bag. Ideal for backpacking but versatile enough for couch surfing, they are insulated with DownTek™ and use baffle construction for efficient heat distribution. If you’re in the market for a mummy shaped bag constructed with high quality, lightweight materials, these bags are your ticket to traveling fast and light.


    It packs really well and I love the storage bag it comes in. The extra neck flap is a bonus. I think it’s too warm for summer but perfect for fall/winter camping.

    WARM, but almost too warm

    • Familiarity: I've used it once or twice and have initial impressions

    This is an awesome sleeping bag. I am short, and the petite size fits perfect. However, it's almost too warm for summer camping. I had to just lay on top of it for most of the night because it was too hot inside. I'm excited to have this for fall camping though. It packs so small and can come on backpacking trips no problem. Easy to stuff. Colors are great too. I matched it with a yellow ultralight Sea to Summit sleeping pad and the set works perfect together.

    I really wanted to love this bag!

    • Familiarity: I returned this product before using it

    The bag itself seemed great, but when I got into it, I quickly realized it was much too small in the shoulders. I'm 5'7", an athletic 135lbs, but I do have broad shoulders for a woman of my height and weight. I tend to have a few issues finding shirts that fit - I have to buy large to fit in the shoulders, but the rest of my upper body would do well with a medium - so anyone who who is a 'normal medium' would likely do well with this bag. It saddened me to return it, as I liked everything else about it except the shoulder width.

    Love this Bag!

    • Familiarity: I've used it once or twice and have initial impressions

    I bought this bag so that i could use it late winter-early spring in the Adirondacks. I used it for the first time in a Lean to this past weekend, The low was 25 degrees F and i am 5'7", I felt like I had enough room to move around and still felt snug enough to keep warm.. I also had the Big Agnes Q-Core Sleeping pad under me that has an R value of 5.0. I was warm through out the night. The only thing I would have liked on this bag is perhaps a small pocket on the inside to hold electronics like your phone or GPS. Other than that it is a great bag and I would recommend this product.

    Great, warm bag

      Bought this for my trip to Africa in July-August. Was used in 10-20 degree Celsius weather (at night) and was perfect...not too hot and was never cold. Compresses nicely to fit into the sac, which is about 1.75' by 0.75' in size. The material is very easily wiped down with soap and water and dries quickly. Very light weight bag, perfect for backpacking.
      Would recommend to anyone who is looking for a mid-price, light weight and hardy sleeping bag for cooler nights.

      Nice and Toasty

      • Familiarity: I've used it once or twice and have initial impressions

      I purchased the petite bag since I'm 5'1" and the length is perfect. I still have some room in the foot box and yet it makes me feel warm and snug like I'm wrapped in one of those Mexican/futon blankets (but not constricting). I have used this sleeping bag on two camping trips so far (Grand Canyon in May and Sequoia NP in June). Both times I slept in just my base layers and nothing else and this sleeping bag kept me toasty. I'm usually a cold sleeper so the draft collar and hood with the draw cord worked perfectly. Also it's super easy to zip up the male sleeping bag to this one to create one sleeping bag. I love that feature! The zippers do not snag either. The bag is lofty and yet you can compress it down to the size of a soccer ball. So it's doesn't take too much space in my 55L backpack. The thought of paying over $100 for a sleeping bag kept me from buying this type of quality sleeping bag but now that I've tried it out, I realized that I should've bought this sleeping bag sooner. Big Agnes did a fabulous job with the creation of this great quality sleeping bag. This sleeping bag comes with not only a stuff sack but a storage sack as well, which makes it well worth the price. I would highly recommend this sleeping bag.

      Unanswered Question

      What is the en comfort rating of the bag? Thanks