I bought my ripstop at hancock fabrics and I'm not sure what kind it is. Has anyone waterproofed any and how did it turn out? Recomendations on what waterproofing to get? I'm thinking of sewing two 12'x5' together to make a 12'x10' and leaving a channel in the middle to run my line through. Maybe putting a knot in the line at each end to keep it from sliding and tying each end off around the tree.