A retroreflective article having at least one valve is disclosed. Each
valve may include a channel extending from a first major surface to a
second major surface of the retroreflective material, and at least one
movable member proximate the channel. The at least one movable member is
movable between a closed position and an open position. When in the
closed position, the at least one movable member obstructs at least a
portion of the channel. A method of making a retroreflective article
having at least one valve is also disclosed.