great info!
Another frequent question..so here's another link article:
http://www.pmags.com/ground-cloths-a-quick-overview
Paul "Mags" Magnanti
http://pmags.com
Twitter: @pmagsco
Facebook: pmagsblog
The true harvest of my life is intangible...a little stardust caught,a portion of the rainbow I have clutched -Thoreau
1 ml plastic painters drop cloth
A piece of Tyvek is pretty handy. I don't use it for a groundcloth but it's great to spread out on the ground for lunch or taking a break - especially if its been raining and the ground is wet.
Lots of other uses for it besides that too - it comes in handy for something all the time.
I like the polycro for a ground cloth. It is very strong for the weight. I find the Tyvek is bulkier and heavier, and can be noisy.
I buy this from Amazon and cut to size:
http://www.amazon.com/gp/product/B000NHY1P0/ref=oh_details_o01_s00_i00
The one thing to watch out for is you dont want to leave it out in the sun because it will shrink in direct sunlight.
Gossamer Gear also sells it:
http://gossamergear.com/shelters/pol...th-medium.html
Construction blah garbage bags are great and multi purpose
Tyzeck is great stuff