These louvered panels incorporate a 3" x 1" noise dampening foam filled foil louver, allowing for a 50% openness. The back of the louvered panel is 100% covered with the perforated Accoustical Surfaces Inc.® silk metal material with an approximate 10% openness. These louvered panels provide some degree of air movement with maximum noise reduction the foam filled louvers and state of the art noise reducing silk metal materials.