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  • Mountain Hardwear - Hyperlamina Spark Sleeping Bag: 35 Degree Synthetic - Ginkgo

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  • Mountain Hardwear - Hyperlamina Spark Sleeping Bag: 35 Degree Synthetic - Ginkgo

Mountain Hardwear Hyperlamina Spark Sleeping Bag: 35 Degree Synthetic

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    • Ginkgo

    9 Reviews


    When every ounce counts.

    Lighten up your pack with the Mountain Hardwear Hyperlamina Spark 35 Degree Synthetic Sleeping Bag. This lightweight bag is ideal for climbing trips in the summer as well as backpackers looking to save some trail weight. Utilizing a welded construction, the bag boasts a better warmth to weight ratio than traditional synthetic fill bags since there are no cold-inducing stitches. Combined with a zoned insulation, which places additional insulation at your core and feet, you get more warmth where you need it, without any unnecessary weight. The center, half-length zipper saves weight, while maintaining the ability to vent the bag if you start to get too warm. The snug-fitting performance mummy cut is designed to maximize warmth while eliminating needless bulk and weight. When the night starts to get cold, fasten the face gasket and cinch down the tailored hood to stay warm, so you're ready to get after it once the sun comes up.

    • 32F EN lower limit rating
    • Thermal.Q synthetic insulation
    • Performance mummy cut
    • Insulated draft collar
    • Face gasket with tailored hood
    • Half-length center front zipper
    • Zoned insulation
    • Welded Lamina construction
    • Comfort footbox
    • Item #MHW00GY

    Tech Specs

    [shell] 22D nylon, [lining] 20D nylon taffeta
    Max User Height
    [regular] 6 ft, [long] 6 ft 6 in
    Shoulder Circumference
    [regular] 63 in, [long] 66 in
    Hip Circumference
    [regular] 58 in, [long] 64 in
    Foot Circumference
    [regular] 39 in, [long] 41 in
    Bag Length
    [regular] 78 in, [long] 84 in
    Draft Tube
    Fill Weight
    [regular] 1 lb 1 oz, [long] 1 lb 12 oz
    35 F
    European Norm Comfort Rating
    41 F
    European Norm Lower Limit Rating
    32 F
    Storage Sack
    yes, mesh
    Stuff Sack
    yes, Sil-Nylon
    Stuff Size
    6 x 13 in
    Claimed Weight
    [regular] 1 lb 10 oz, [long] 1 lb 12 oz
    Recommended Use
    backpacking, alpine & expedition
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

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    Good bag

    • Familiarity: I've used it several times

    Packs down very small for a synthetic bag. I was a little skeptical about the middle zip, but I actually really like it and it never snags. Seems warm than is rating, and it's reasonably water resistant, as morning dew did not get the inside of the bag wet at all.

    Excellent Bag

    • Familiarity: I've used it several times

    This bag is has been a real champ. It packs down extremely small, is relatively light, and is very warm. I like the middle zip rather than the side zip as I sometimes hammock camp and the side zip gets a bit awkward in a hammock. Others have stated the zipper only going partially down makes getting in and out of the bag a bit awkward but I have not had this issue (I am rather short at 5'9" though) and it definitely helps keep the bag a bit warmer. Overall I could not be happier.

    Awesomely packable synthetic!

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

    I almost thought this was a down bag when I'd initially picked this baby up because it was packed in such a small stuff sack. I don't know of too many synthetics at this temperature rating that can be compressed to this size. I was as able to test this bag out in one of my usual spots near the Great Salt Lake. It was cold, rainy, and windy in the low 40's, but I still slept like a baby! If you don't feel like breaking the bank to buy a down bag with water resistant insulation, this is absolutely a great option at a great price point! The one downside I saw here was that this Ginko color can appear to get dirty easily. So you'll just want to be a little more careful of getting dirt on it, unless you don't care about the visual asthetic of it anyway. Overall. pretty sweet piece to add to the gear closet!

    Packable, Warm Bag

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

    I havne't gotten to use this bag too much yet, but I took it on an overnight trip up into the mountains near home and it was amazing. I wasn't sure at first about the half zipper in the front but I found it was really easy to get in and out of the bag, granted I'm not a very big person (5'4). The cut seemed comfortable and not too constrictive, roomier than I expected from such a lightweight bag. One big pro was that its stuff sack comes with compression straps! I think that's such a nice tough and this thing gets down to the size of a small loaf of bread. I stayed nice and warm on a night in the low 40s and the material felt soft and comfortable. Overall an awesome bag, especially for the price!

    Great Bag

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

    This bag met my one goal: Find a synthetic bag that packs down extremely small but can withstand some cold nights. The face gasket with tailored hood is awesome and serves its purpose wonderfully.


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

    Haven't used the bag yet. I did try it out in my house and can say it's a bit awkward getting in and out bc of the half zipper. And once zipped up its pretty restrictive on your arms. But I supposed that is true of any bag. But it packs down to a good size and is super light. For the price I still think it's a good purchase


    • Familiarity: I've put it through the wringer

    Let me start by saying that I sleep cold... Very cold... Even in the summer. I bought this hoping that that review when it won an award was accurate and truthful. Let me tell you... I love this bag. For synthetic it packs down nicely and its light. I've used this bag in the Green Mountains on the AT in Vermont. There were some nights that dropped below 40 & still stayed warm. For nights over 40 (even by a degree or 2), shorts and tank were fine to sleep in. As of yet, I haven't had to wear base layers to sleep. Besides the warmth factor, some other great features are: the shape of the hood that holds your pillow securely without it sliding around, the center zip that you can always find in the middle of the night and gives you easy access and venting, the material is very soft, and for me at 5'2, I've got plenty of room to move around without feeling constricted. As for durability... I've had it out over about 20 nights (maybe more)... it's been through all the stuff you'd expect it to have gone through and it still looks brand new. I think this bag is gonna have a long life.
    I do store it over the winter in the mesh sack that it came with. Even though it isn't down and it is synthetic, I never store it compressed and I always take it out, lay it out and air it out after each trip.
    Oh and the weight! The warmth, comfort and features in a synthetic bag at 26oz??! Awesome-sauce!

    Hyperlamina spark

    • Familiarity: I've used it several times

    Used this a few times in S. UT during March. Still gets fairly chilly at night during this time of the year. Had to break out my bag liner a couple time because the temp got too low. Overall a good bag. Packs really well and looking forward to using it this summer. A lightweight synthetic like this bag will come in handy in more wet climates than UT

    Love / Hate

      I got this bag to replace my very old bulky Kelty 20 Degree. Opted for the 35 instead of the 20 simply because I either seem to need a warmer weather bag, a 0 degree, or none at all. I was very impressed by the packability and weight. One of the major selling points was that it is nearly as packable as a down bag of similar temperature rating and weighed nearly the same as well. The flip side of the lightweight construction is the durability as it relates to the zipper. The central zipper is a great idea and does help shed some weight. At first I thought I would like the central only half zip, but as a hot sleeper its rather annoying for the shoulder seasons being unable to sleep with one leg out. The other part of the zipper I don't like is how easily the inner part of the bag catches in the zipper pull. On my 3rd day out I caught the bag in the pull and tore a section of my bag which I had to patch. Not bad with it warm out, but I wouldn't want my punctured bag to be loosing insulation in the middle of the night when it was colder.

      Pros: Packable, light, warm for the rating

      Cons: Flimsy shell and inner. Half zip is annoying