Plastic absorbs UVC and renders it ineffective. Our SteriShoe sanitizers are designed to be as open as possible to provide direct UVC exposure to the shoe interior. We are aware of other ultraviolet shoe deodorizers that have the lamp almost completely encased in plastic; the plastic in these products blocks almost all the UVC light from reaching the inside of the shoe.
SteriShoe sanitizers are the only product that has been awarded a Seal of Acceptance from the American Podiatric Medical Association for cleaning the inside of shoes. It is also the only product clinically proven to destroy harmful germs inside shoes that can cause foot infections and shoe odor (as published in the Journal of the American Podiatric Medical Association)