[Elecraft] Extremely light KX1 portable external power supply

[Bob Nielsen]

On Thu, Jan 08, 2004 at 11:35:34AM -0500, Thomas Beaudry wrote:
> >I inserted a single layer of the strong fiber paper used for a
> >credit card holder.  (I've forgotton the proper name of the stuff:
> >it's also used for Priority and Express Mail envelopes.)
> 
> Tyvex.  It's also used for home construction, vapor barrier being the 
> best example here in the Southeast US.  You can buy large rolls and 
> small sheets at Home Depot.  I've seen small sheets also in the crafts 
> section at WalMart.
> 

Actually it is spelled Tyvek.  It is a product of DuPont
<http://www.tyvek.com>.