The European true HEPA equivalent which is increasingly marketed in North America as medical grade is designated H13, and its requirements are virtually identical: 99.95% single-pass capture of the most penetrating particle size (or MPPS)
According to Action on Smoking and Health (ASH), the UK's leading tobacco control charity, tobacco smoke contains over 7,000 chemicals, at least 250 of which are harmful and 69 of which can cause cancer, heart disease, stroke, and chronic obstructive pulmonary disease (COPD)
However, because regulatory agencies seem more likely to go after manufacturers who offer sweeter flavors, many companies are hesitant to include fruit-flavored options, and will limit themselves to flavors related to tobacco
This table breaks down our two main options to help you see which one fits you best