I also failed to chime in earlier about fabric a wally world.My business takes my all NY, and I use WW as a pit stop.I currently own about 400yds. of ripstop. This is addition to the projects that I and my scout troop have completed over the past 2 years. Of this 500-550yds. total I have found 5.5 yds. of silnylon. I haven't been able to bring myself to cut it and use it. I have however made several tarps using ripstop and applying my own mix of sil-napalm.