Perforated window clings are made of adhesive vinyl with micropunctured holes that allow one-way vision. So you can apply perforated clings on your storefront window, but they won't obscure the view from the inside or darken the room, because they allow light to come in. Yet on the outside, the perforated window cling will appear colorful and opaque. Passersby cannot see in. So you get the best of both worlds.