Personal Best® was specifically developed to meet the needs of those patients for whom portability is a key factor in gaining patient compliance. It has an exceptionally compact and lightweight structure that folds into a unique self-contained protective carrying case, allowing patients to carry it wherever they go. In addition, Personal Best incorporates the same patented flow sampling technology as the Assess® Peak Flow Meter, delivering superior accuracy, reproducibility and consistency. And like Assess, Personal Best meets all of the standards established for peak flow meters by the NHLBI National Asthma Education and Prevention Program.