1.1 oz Silpoly
I've been purchasing the Silpoly and Silnylon to make inflatable mascot costumes with....both products work great!
The tarp kit is great for anyone just starting to sew their own gear. The kit provides ample material to make any size rainfly you want with enough left over for its own stuff sack. I made mine with an 11 ft. ridgeline and cat cuts on all sides. Make no mistake, the material is very slippery, so be sure to double check all lines before cutting as the material has a tendency to slide on itself. My only complaint is with the tie-out reinforcements. The pieces are now pre-cut, but are not as large as I was expecting which made it difficult to attach them as shown in the directions. Overall, a great product. My next adventure will be the winter version of the kit.
I purchased some 2nds quality silpoly in the past, and was disappointed by the feel. This recent purchase is soft/supple, and feels wonderful! Made it into a tarp and has had one night of rain, in which I stayed dry (except through my unsealed ridgeline)