A friend of mine had quite a bit of dry material, and we just recently sent it through the 150 micron bubble bag. Using three shake sessions per load, it yielded two rounds of nice blond with the third round containing a bit more plant matter. I found with the quality of material we were using, I could have probably used a 200 micron bag and got more yield. But with more yield comes more plant matter, and less quality. I figure, anything that may have been held back trichrome wise, I'll take care of in some cannabutter.