I'd love to know where you buy Synthrapol. I googled it, and it brought up several different kinds. So, I need to know which kind to get, also. I am about half way finished with a batik quilt that was not prewashed, so it will definitely need to be washed. I also like the idea of taking it to a laundromat to wash and dry. It is a queen size, so I don't think it would wash well in my regular washer.