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  1. #1
    Senior Member Bradley's Avatar
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    Jun 2010
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    0C: Clark JH, Z-Liner Test

    It seems that Friday nights are my backyard hang nights,
    and last evening I saw on theweathernetwork.com
    that it was going to be 3C, and it would be a good test
    for the Z-Liner and the equip. that I have.

    When I layed in last night at 23:00
    I hadn't taken a temp. reading
    but felt some cold spots.

    I was wearing long-johns, socks, long-sleeve T-shirt, vest, toque.
    TQ, is my old indoor down Q, folded in half, and tack-sewn that way.

    I slept good and straight through till 03:00, when I woke and was kinda cold.
    As I moved inside, I grabbed my Infrared Thermometer, (IFT)
    and shot a 1.1C temp on the side of the house.

    As I lay in my Recliner, it took a while to warm up,
    how long ??? Not sure as I fell asleep still cool.

    I shot the temp of the underside of my hammock this morn at 08:00, at a cool 0.1C
    I had my tarp up as well and this morning there was no frost nor moisture on it.

    I will be posting on our local yahoo site (buy, sell, give-away)
    for a down quilt (DQ), and see if I can score a couple to use as an UQ
    I am thinking that if I cut up a DQ and add it to the pockets,
    one layer Z-Liner, one layer cut up DQ
    and then (considering that the pockets have a seam between)
    hang a single layer of DQ under as a UQ, to seal in those between pocket seams,
    I should be good-to-go for even colder temps.

    Will continue to post as info rolls in.

    Foot Note: I am not sure how low I could sleep with just the Z-Liners,
    but as I missed that temp will look for that one and post it when I find it.

    Ground Note: Am I a cold/warm sleeper ???
    Not sure that has changed over the years, but,
    In the summer I seem to have less tolerance for the heat,
    and in the winter I seem to have less tolerance for the cold,
    and that is just in the house at room temp, let alone out side.

    I am thinking that my body temp regulator is not servicing the opposite extremes like it use to.
    Mind you while sleeping in the house, I still only sleep in my Ginch and a T, socks,
    and use the DQ in a single layer, as I have for years.
    Bradley SaintJohn
    Flat Bottom Canoe
    Start A Biz

    The Transition from Ground Sleeping to Hammocks
    is the Conversion from Agony To Ecstasy,
    and Curing Ground-In-somnia.

    "Call unto me, and I will answer thee, and show you great and mighty things . . ." Jeremiah 33:3
    ΙΧΘΥΣ

  2. #2
    Busky2's Avatar
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    Aug 2010
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    PENN'S WOODS
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    First off thank you for the report. I have a NX 250 and was wondering about a Zliner and how it would perform. I made a DIY UQ out of a synthetic bag and was very happy to 35*. But I was wondering if a set of pocket liners like the Z would add a great deal of added protection from the cold or would they screw up the UQ. If I may ask just what are the size of those pocket pillows and are they very thick?
    Whether trail or paddle don't you know
    My hammock is the way to go
    There peace and solitude I find
    To ease all troubles from my mind
    Both body and soul revel in delight
    As day surrenders to inky night

  3. #3
    Senior Member Bradley's Avatar
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    The Z-Liner fits and fills the pockets full width and length
    and lofts to about 1 or 1.5 inches.

    I think they are a nice start to mild cold weather
    and when added to will make for a good way to go.

    If I don't find some Down Quilts,
    I will likely order a sheet of CLIMASHIELD HL
    and add another pad to each pocket and a single or double layer like an UQ to finish it off.

    I would like to be able to get down to -30C or so . . .

    I'm not sure we will see that cold here,
    but they are saying we will have a bad winter this year . . .

    It has been 50-60 years since the lake here has froze over as below




    last year, same month

    Bradley SaintJohn
    Flat Bottom Canoe
    Start A Biz

    The Transition from Ground Sleeping to Hammocks
    is the Conversion from Agony To Ecstasy,
    and Curing Ground-In-somnia.

    "Call unto me, and I will answer thee, and show you great and mighty things . . ." Jeremiah 33:3
    ΙΧΘΥΣ

  4. #4
    BrianWillan's Avatar
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    Oshawa, Ontario, Canada
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    Open Cell Foam

    Hey Bradley

    Another thing you might try is Open Cell Polyurethane foam. It's the same stuff that the under pad is made of in the HH super shelter. Head to your local upholstery supply place and look for foam seat cushions in the soft or super soft feel and around 1.2 pounds per cubic foot density. Try for about a 1" - 1.5" thickness. They should be relatively cheap at just over $1 per board foot (144 cubic inches). Get 1 for each of your Clark pockets and cut them to size and see how that works for you.

    Cheers

    Brian

  5. #5
    Senior Member leepingreenlizards's Avatar
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    Locust, NC
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    Have you tried placing a "HeatSheet" or windshield reflector between the hammock and the z-liner? Another thing is to make sure you don't employ the netting on cold nights like that. It collects condensation, soaks everything and really makes for a cold nights sleep.

    I've even pulled the sides of the "HeatSheet" up past the zippered area and find it increase’s the warmth considerably.

    As far as the -30c (-22F) goes, you'll need considerably more loft than the 1.5" loft of the z-liner. I always try to think of warmth in terms of loft (trapped warm air)...in most instances. A good example would be to take a look at the custom bags used by mountaineers in extreme cold and high altitude. The bags and other insulated gear have ballooning amounts of "quality" loft.
    Last edited by leepingreenlizards; 10-17-2010 at 10:07.

  6. #6
    Senior Member
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    Was it windy? That can have a pretty big effect on stealing heat from underneath you.

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