Aspire Respiratory Products is the maker of the EMST150, EMST75 and IA150 adapter. The EMST150 was the first calibrated expiratory muscle strength trainer created specifically for individuals who want to enhance their breathing, cough, and swallow function. Designed by a well-respected team of researchers, the one-of-a-kind EMST150 is the most scientifically tested and clinically validated respiratory trainer available.