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  1. #1
    Senior Member
    Join Date
    Sep 2010
    Location
    harrisburg, pa
    Hammock
    Grand Trunk Nano 7 or Byer Moskito
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    zpacks cuben
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    tips on mummy coccoon

    Mummy cocoon tips. Doesn't fit in "weather protection" or the top or bottom insulation message boards, so I'm going with the general board.

    After spending about 15 nights hanging last year and 21 this year in a hammock surrounded by a down mummy bag as a cocoon, here are some tips that Iíve learned from experience and fine tuning. First the gear list.
    40 degree North Face Light Year down mummy bag with zipper opening in footbox for late spring through late summer. Long lenth.
    15 degree Sierra Designs Nitro down mummy bag Ė 800 fill!! Ė for early spring, fall, and winter. Long length.
    Grand Trunk Nano 7 hammock with whoopee suspension, straps and trail-stick toggles.
    Papa Smurf Bug Sock for hardcore buggy summer nights.
    Coghlans bug head net spring and fall when my body is covered by the bag but the bugs will still eat my face.
    Netless in winter.
    Zpacks cuben fiber hammock tarp with doors. Ah, the luxury. Ultra light. Ultra big. When pitched to ground, an tent. In good weather pitched high, a veritable pavilion.
    With the 15 degree bag, Iíve hung as low as 5 degrees and felt very warm and slept like a baby.
    My stats. Male, 5 ft 10, 155 pounds. Nano 7 plenty big for me. Structural ridge line allows consistent sag every time for comfortable diagonal lay.

    Tips on using a bag as a cocoon. A long length bag on an average height hanger allows you zip the foot box zipper down to allow just the whoopee to exit the zipper, which keeps all the warmth inside the bag and the drafts out. Iíve experimented on very cold nights with the foot zipper open to allow the bag to be pulled up over the exiting channel end of the hammock, and by putting my cuben fiber pack cover down in the foot box, it blocked all drafts and was comfortable. However, at 5ft 10 I can keep the bag down at the end of the hammock with just enough zipper opening for the whoopee to pass through. By tightly drawing up the drawstring at the top end of the bag, the bag conforms snugly to the entire bottom of the hammock. It creates an underquilt with no required suspension and no sags or air gaps. Toasty. Here is the trick. The U-shape cutaway profile of the hammock means an air gap at the chest/neck, for a man. Many a chesty woman wouldnít have this problem. So take your rain jacket or wind shirt or any surplus piece of clothing and tuck it on top of your chest/neck to seal that gap. Works great for me as a back and side sleeper. Your results may vary. I use no CCF pad under me until the temperature drops to 30 or lower. The bag serves as an effective underquilt. But I find that below 30 degrees, regardless of my wonderful 800 fill down bag serving as an underquilt, my back gets a little cold. I am comfortable sleeping on a pad in my hammock. Many are not. But I am. And from 30 degrees down to 5 degrees the pad beneath me and the bag pulled around my hammock has kept me toasty warm. In summer, I wear briefs and short sleeve wicking shirt in the bag. Spring and fall, smartwool long bottoms and top. Below 45 degrees I pull a Montbell down sweater on top. Below 30 a light Columbia down jacket on top of that. At 5 degrees I wore light fleece pants, too. This works since at 5ft 10 and 155 pounds, I have plenty of room in the bag for the extra layers. On all but the most hot summer nights I like a light fleece beanie on my head. Below 45, beanie, with a smartwool balaclava underneath. Below 20 a heavier balaclava. Since the bag hood does not completely envelop your head in this system, proper head protection is key. The hood comes behind the bottom of the hammock and keeps the back of your head and neck warm. But you really need proper full head protection.

    OK. Thatís my story. This is an ultra light, no-fiddle, packs-really-small system. Itís not for everybody but it consistently works for me.

  2. #2
    New Member
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    Jun 2010
    Location
    Lakewood, CO
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    4
    I may need to see a picture of this.
    Can you still lay diagonally with the bag wrapped around the hammock? I've tried this with an Exped Wallcreeper and had mixed success.

  3. #3
    OutandBack's Avatar
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    Dec 2010
    Location
    Denver, CO
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    Snipe WinterGnome
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    Sounds neat. Would like to see a picture of your setup.
    My question as well is how asym can you get in a coccoon?

  4. #4
    Senior Member
    Join Date
    Sep 2010
    Location
    harrisburg, pa
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    Quote Originally Posted by OutandBack View Post
    Sounds neat. Would like to see a picture of your setup.
    My question as well is how asym can you get in a coccoon?
    I solo camp mostly, so I can't photograph or video myself while in the bag. I feel like I can get a very comfortable diagonal lay, although it sort of defies physics since the bag has limited internal room. But I suppose it is stretching and spreading and conforming. Here is a video link to my setup. http://www.youtube.com/watch?v=4C9hZYe4dno

    I think I misidentified two of my bags. I have a Kelty lightyear down bag in 40 degree and 20 degree variations, and also a sierra designs nitro 15 degree down bag. The video shows the 20 degree lightyear.

  5. #5
    OutandBack's Avatar
    Join Date
    Dec 2010
    Location
    Denver, CO
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    Nice vid. I like your setup a lot.
    I have a 5 degree tall/wide down WM bag that has a zip in the foot. I think I'll try this.

    thanks

  6. #6
    OutandBack's Avatar
    Join Date
    Dec 2010
    Location
    Denver, CO
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    stock
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    Wow man you are right it works great.
    I had no trouble getting asym left or right using this method in my net-less Switchback hammock.
    Feeling under the hammock the SB was snug against my back
    but not compressing the down.
    I warmed up instantly and it's about 28F right now.

    thanks I think you just saved me a bundle.



    I used two tarp Grip Clips with 2' of 1/4" shockcord to hold the head end in place.


  7. #7
    R00K's Avatar
    Join Date
    Jan 2011
    Location
    Baltimore, MD
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    UL BMBH
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    CloudBurst
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    920
    This is my favorite method for winter camping.

    I'm deciding now if I'm ordering a Feather Friends Rock Wren in a long for my winter set-up or not. I'm already getting a breathable hammock sock which I think will take me down to 20* - so the question is if I'll need to pack for colder than that or not. I'm leaning towards "maybe next year".
    Support: HammockGear - Zpacks - Jacks R Better - DreamHammock - Dutchware - AHE - Black Rock - Grand Trunk

  8. #8
    Senior Member
    Join Date
    Sep 2010
    Location
    harrisburg, pa
    Hammock
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    Quote Originally Posted by R00K View Post
    This is my favorite method for winter camping.

    I'm deciding now if I'm ordering a Feather Friends Rock Wren in a long for my winter set-up or not. I'm already getting a breathable hammock sock which I think will take me down to 20* - so the question is if I'll need to pack for colder than that or not. I'm leaning towards "maybe next year".
    I also bought a custom cuben fiber vapor barrier liner for my sleeping bag from zpacks. I believe that one night this past March in about 15 degrees I slept in smartwool top and bottoms, inside the cuben VBL inside the bag, with my down jacket inside the bag on top of my chest sort of like a blanket, and no pad beneath me, with the 15 degree bag pulled around my hammock. I was quite warm. The VBL traps moisture inside and prevents the down from getting moist and heavy if you're out for a few days, and keeps the air from moving around inside. WOnder what is more efficient in terms of warmth and light weight -- the hammock sock or a cuben VBL? I think I paid about $80 for the VBL. That darn material is expensive! But worth it.

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