Originally Posted by VickyS
What about Ripstop Nylon (that used for Kites and balloons)? It's available in multiple colors from Joann's.
Reason I mention it - I used to backpack and this was the tent and rain poncho material used - it worked great in all but a heavy downpour.
This is what is used for the flags for high school flag corps and for cloth banners for outdoor use. I did a large banner with 12" appliqued letters that has been in use for about 3 years.