My son is six and uses his vest 2x a day for 30 min each. If its a bad day he will use his accupella one time in the afternoon also. If you want to google the vest one is www.electromed-usa.com there is another one but not sure the site. We also just got a purcussor which is only $2500 vs. $12,000 for the vest. Hope he has a great winter with no visits to the hospital.