Thanks for the ideas. Cuben is expensive. I have an Ursack - do not want to stuff my sleeping bag in something that has food odors. Thanks for the tyvek offer - but I ran out of time - am leaving on my BIG trip Tuesday at the crack of dawn! So I bought a granite gear nylon sack- $12 and 3.2 oz. A bit over what I consider "Cheap" and certainly not as tough as I would like.