These are different materials used to build our shutters and each comes with their own set of benefits. Polyresin is a durable vinyl plastic used in our AllView shutters. Polyclad is a mix of wood and polyresin and used in our ShutterSMART line of shutters. The inside of the shutter is hardwood which is inserted into a polyresin sleeve. Composite is High Density Fiber and means we cut up wood into tiny pieces and compress those fibers together to make an even stronger form of wood. Instead of coating these shutters in paint, we complete them with a poly coating for added durability and longevity.