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WPB Material and Lining?


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  • #1276110
    Rob Hubbard
    Member

    @robwa10

    Locale: England

    I've been considering using this material on a meteor bivy.
    http://www.extremtextil.de/catalog/Fabrics/breathable/Micro-Ripstop-laminate-glossy-55g-sqm::1427.html

    I must admit though I'm a bit confused on the whole WPB material front. I know that some have to be used with a lining. Others incorporate a lining into the fabric and it seems it is optional with others?!?

    So would I have to use one with the above material and any good links to some solid information on the whole topic? If I would have to use a lining then what sort? If it's too heavy then it defeats the purpose of using that material.

    #1754694
    Kevin Beeden
    BPL Member

    @captain_paranoia

    Locale: UK

    There are usually two reasons for using a lining on a WPB fabric:

    i) to protect the coating from abrasion (if it's a 2-layer fabric);
    ii) to stop you noticing condensation.

    For a bivvy, I can't really see that either is applicable; you don't get the same degree of continuous movement that you do with clothing (so wear shouldn't be a big issue), and any condensation (of sweat) is likely to get to your sleeping bag through a liner, anyway… Since you're not very active when in a bivvy, condensation is likely to be less of an issue than in clothing (assuming you're venting your breath somehow).

    #1754920
    Sam Farrington
    BPL Member

    @scfhome

    Locale: Chocorua NH, USA

    You could email them about ordering a sample, and see how the coating stands up to abrasion.

    That is about 1.5 oz/sq/yd. Lighter than some silnylons. Too bad they only have it in black. But note that some of the vendors give the weight of the material before the coating is added. You could inquire about that also.

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