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  • Big Agnes - Mystic UL Sleeping Bag: 15 Degree Down - Graphite/Sunflower
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  • Big Agnes - Mystic UL Sleeping Bag: 15 Degree Down - Graphite/Sunflower

Big Agnes Mystic UL Sleeping Bag: 15 Degree Down

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    • Graphite/Sunflower

    4 Reviews


    A tasty down morsel.

    Strap on your feedbag and chow down some serious sleep with the Big Agnes Mystic UL 15-Degree Down Sleeping Bag. It has plenty of warmth for three-season backpacking trips and will also crush it winter hut or yurt trips. The Mystic ditches bottom insulation in favor of an integrated pad sleeve, which saves on weight and boosts warmth. As a result, the Mystic weighs less than 2.5 pounds. Don't think for a second that it sacrifices warmth, though; it's loaded up with 800-fill DownTek water-repellent down that's arranged in Insotect Flow vertical baffles. The baffles conform to your body for increased warmth and comfort and use internal gates to keep the down in place so you don't have to deal with cold spots.

    Not only is the down water-repellent, but the Pertex ripstop nylon fabric is so tightly woven that it prevents moisture, like tent condensation, from seeping in. The rectangular shape means you have a few sleep-position options. Drafts tremble in fear before the Mystic thanks to the no-draft collar, wedge, and zipper that keep them locked out and your heat locked in. And, as a final touch, Big Agnes designed the Mystic so that left-zip bags can connect to right-zip options, letting you and all your stuffed animals sleep together comfortably.

    • 15 degree temperature rating
    • 850-fill DownTek hydrophobic down insulation
    • Rectangular shape
    • Pertex nylon ripstop fabric with water-resistant finish
    • Pertex down proof lining
    • Ergonomic hood
    • Draft collar and tube
    • 70-inch YKK side zipper
    • Integrated pad sleeve
    • Flow construction
    • Mesh storage and nylon stuff sack included
    • Item #BAG002Y

    Tech Specs

    Pertex nylon, water-resistant coating
    850-fill DownTek water repellent down
    Max User Height
    [regular] 5 ft 10 in, [long] 6 ft 6 in
    Shoulder Circumference
    [regular] 70 in, [long] 73 in
    Hip Circumference
    [regular] 66 in, [long] 69 in
    Foot Circumference
    [regular] 54 in, [long] 55 in
    Draft Tube
    Pad Retainer
    Fill Weight
    [regular] 14 oz, [long] 16 oz
    15 F
    Storage Sack
    yes, mesh
    Stuff Sack
    yes, nylon
    Stuff Size
    [regular] 8 x 8 in, [long] 8 x 8.5 in
    Claimed Weight
    [regular] 2 lb 5 oz, [long] 2 lb 9 oz
    Recommended Use
    camping, backpacking
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    More like a blanket than a mummy

    • Familiarity: I've put it through the wringer

    I used another brand mummy bag (still very comfy) for years. I was looking for something different and found this bag. I had to get a new sleeping pad (to get enough R-Value to warm my backside) and the combo is fantastic. The bag is more like a blanket than a sleeping bag. I have so much room! I do get challenged when putting my sleeping pad into the sleeve but the end results are SO worth the effort. I love than I never come off of the sleeping pad. I recently spent numerous nights in the high sierra and was so warm and cozy. Probably the best nights sleep I have had on the ground in a long while. I highly recommend this bag... might get one for hubby!

    Ah! Sleep, at last!

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

    I prefer to sleep sort-of on my stomach but with one knee bent (think "can-opener" off the diving board), and I shift from one side to the other a lot... I'm miserable in mummy bags, waking up periodically to untangle. I love, love, love the Mystic.

    Because it's attached to the pad and plenty wide, I can twist and turn all I want. I was worried that all that extra footspace would be tough to warm up, but I was perfectly warm on a 23F night with my Klymit insulated static v pad (R value 4.4, I'm female, 5'7", 150#) And my pad is 23" wide but works just fine in the sleeve.

    I wish the hood and neck baffle had separate drawstrings, and I hate velcro near my face (to secure the zipper), but those are minor complaints. FYI, I only found loops to attach a liner at the top rather than on the sides and footbox like some other bags, and there's no stash pocket for a phone, but again, not a deal breaker for me.

    This bag happens to mate with my husband's REI's Igneo, so it might work with other REI bags as well.

    Oh, and I got it into a 10L compression sack rather than a 14L, so you can choose based on whether you prefer narrower diameter but longer, or shorter but fatter around once compressed.

    p.s. I can sit up while my pad is in the sleeve, the pad just folds up with me.

    Epic Bag!

    • Familiarity: I've put it through the wringer

    I bought this bag because I wanted a tech bag that wasn't an extremely narrow mummy shape. I was concerned it wouldn't keep me as warm because of the roomier shape, but I've had no problems. (Wouldn't take it to Everest, but it does the job in every climate I've been in) I camped with this bag all over NZ, and it never failed me. Ultra soft and cuddly. There's a slit on bottom so you can slide in your pad, which is perfect for me since I always wake up next to my pad. Warm when you need it to be, but I've also used it on warmer nights and I didn't have any problems with overheating because it's nice and breathable. Also comfortable when zipped up; I don't feel choked as I did with my previous bag. Highly suggest this bag, it's worth the cash!

    coloring waaaay off

      This seemed like a very nice sleeping bag,very light
      yet when I opened it,it wasn't the "Graphite/Sunflower as described
      more like a chocolate/orange coloring.
      sent back and am scoping out another one,hopefully Agnus will appear pertier on the next one. :n)~

      Unanswered Question

      The big agnes website lists hip as 69 circumference and foot as 55 for the long (not 68 and 53) Is the one on Back country an older model perhaps?

      What is the difference between this bag and the Lost Ranger? both seem to be 15 degree down...


      You're correct that both the Lost Ranger and this bag are rated to 15 degrees. There are a few differences as to why one might suit a certain user over another:


      Mystic UL: 2lb 5oz (regular)

      Lost Ranger: 2lb 11oz (regular)


      Mystic UL: 850 down fill

      Lost Ranger: 650 down fill

      The Mystic UL is also a bit more stream lined at the hip and foot box being an inch less.

      Shoot me an email with any Big Agnes questions!

      What pad sizes work with this sleeping bag?

      Best Answer

      Pad sizes that work with each sleeping bag size:

      Regular (Sleeping Bag): 20"x72" or 51cm x 183cm

      Long (Sleeping Bag): 20"x78" or 51cm x 198cm

      Anytime you have a Big Agnes question, shoot me an email and I'll make sure to work with you 1-on-1!

      Jared D.

      Expert Gearhead