several year ago, I found both breathable, uncoated ripstop and coated ripstop at Walmart for $1.50 a yard. I bought a whole bunch of it. I remember that the bolt was mis-labeled. It was too long ago to find an item number, even if it wasn't mis-labeled. I made a quilt and a hammock out of the breathable stuff. I still have the quilt, works great. The hammock broke eventually, with me in it
. I made a tarp with the coated stuff....It eventually started leaking. I tried resealing it with not much luck. I finally decided to just buy the good stuff. That is where I am right now. I bought some silpoly from ripstop by the roll. Yesterday I started cutting it out. I need to hurry and sew it for this summer.