Any of these fabrics are great, and superior to most tent fabrics with HH ratings on average to only 1200 mm. I believe the minimum HH rating for the above mentioned fabrics are 1500 mm. I also only have experience with the silpoly that is carried by OES. I bow to the experience/opinions of Kitsap Cowboy, as he is the master tarp DIYer, and I just buy premade gear.
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