The Vest Airway Clearance System is an easy-to-use airway clearance device for both children and adults. Unlike manual chest percussion therapy (CPT), The Vest System treatment does not require special positioning and breathing techniques. For more information google "the vest airway clearance system." I have for sale one used Vest, model 104. It is in working condition and comes with Adult Large and Medium vests and a carrying case. I don't have the DVD. One hose may need to be repaired (some tape will do) or replaced. You must be licensed to resell this device for me to sell it to you, according to the FDA.