Modern Classic Series Composite MDF Paneled Interior Sliding Barn Door with Hardware KitCALHOME molded panel doors are made of high quality MDF, a composite material milled in a one piece frame, to withstand changes in heat and humidity better than solid wood. Each door is carefully crafted in the USA to ensure quality over the years. The sliding door track hardware and interior door combination integrate style and functionality. The sliding track design transforms your doorway while saving space. For best results with sliding door