Often pronounced as a “louver” (from the French word “Louvre”, where the product has touched the peak of its popularity), is a solid or hollow plank that makes up the shutter. Also known as slats, these planks can be found laid in a single layer in classic, blind-style shutters. However, with the invention of modern Kombi and Hi-lite shades, the concept evolved. There each louver is followed by a sheer mesh net to provide better control over various aspects (e.g. insulation, light entrance, privacy, etc.).