Here is a source for 3M propore it is a king size materus cover made out of 3M propore: http://www.improvementsplanner.com/home-improvements-mattress-cover-king-10002814.html Is this the same material that is used in waterproof rain jackets like Rainshield O2 rainwear? Is there a better sources for a microporous polpropylene laminate? The Jackets made from this are very light does any one know the actual weight of a square yard of 3M propor? Has any one made anything out of this? I know that are not as durable as other water proof breathable fabrics but might this be durable enough for the top of a bivy? Thanks for the info.
