Made a pyramid tent, excellent fabric, not that expensive, light weight
The silpoly Membrane product is a nice material with a soft feel. It would be a good choice for a rain jacket. I purchased it for a lightweight tent, but don't know if it will hold up as well as the Membrane silpoly 4000 material.
Membrane silpoly is the best. It doesn't stretch and sag when wet. A taut tarp shedds wind better than a saggy one. Bonus, the poly fabric doesn't get soggy and heavy like nylon. A nylon tarp can get soaked with even a light dew. Langiappe, Membrane has the same low stretch as polyester thread; unlike nylon it won't stretch along long hems or seams and pop the stitching.
Again...great service and product (materials). The material performed so well for the sleeping down quilt that I made for camping. Light, strong, soft and very breathable.
Great material that is a pleasure to sew. Very light weight, and as always a great experience with the RSBTR team. They are one of the reasons I get all of my material from them.