I need to call upon the wisdom of the forum. I'm new to the DIY hammock gear and our scout troop is getting ready to make hammocks and tarps. I'm just confused on the tarp fabric. We can't afford to get silnylon but obviously want a "water-proof" nylon for the tarp. I'm just not sure what the difference is when a fabric says "DWR" or "water-resistant" or "water-proof" or "urethane coating." Do they say "water-resistant" just because nothing is water-proof? Does "DWR" not necessarily mean there is a coating, referring to nylon's natural ability to shed water? Does "DWR" mean there is usually a coating of, most likely, urethane?
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