Okay Marie thank/you. Did you find that it helped a lot? My Dr. has me on a sequence of the vest that lasts 40 mins!!! It does seem to bring up more mucus, but only small amounts at a time. I’ve done it separately also, and try postural drainage at the same time. But 40 mins is a long time with the vest only. It takes about 30 mins to nebulize before the vest. (Albuterol & 7% saline). Just looking for effective shortcuts I guess. But every bit of mucus helps.