Most of the lightest dry bags and pack liners that I've found are around 2 ozs, and that just seems way too heavy. So I made a simple roll top dry bag that weighs a half ounce using 0.51 oz/sqyd that is large enough to hold a 20 degree winter quilt and a puffy jacket. To some people it may seem a little extreme to go to all this trouble to save 1.5 ozs, but in this case the weight savings is 75% over the lightest alternatives.
This roll top dry bag is 26" x 18" and is made using a triple stitched flat felled seam that is taped on the inside. I used small 1/2" clasps attached to the bag using 1/2" gross grain webbing. The attachment points are reinforced with 0.51 oz/sqyd cuben fiber and cuben tape.
|Cuben Fiber Roll Top Dry Bag.|
|Triple stitched flat felled seam (taped on the inside).|