Face masks are now part of our daily attire, with 129 billion being used globally each month. But we're still learning that some styles may be better than others. A new University of Waterloo study found that popular disposable surgical masks are only 10% effective. Dr. Michael Hertz told Inside Edition that N-95 masks, which fit snugly against the face, still offer the best protection. But if you can’t get your hands on one, there is one way to make disposable surgical masks more effective.