Item Description Come home to the warmth of mahogany with the new Fiber-Classic Mahogany Collection. Timeless styles and a rich mahogany grain join together to create the latest line from Therma-Tru, the leader in fiberglass entry doors. As the trend for home interiors moves toward darker, richer wood tones in everything from cabinets to furniture, the Fiber-Classic Mahogany Collection, with its rich, welcoming grain, allows homeowners to extend this look to their exterior entrances.