The Durability of Grosfillex Commercial Furniture: Built to Last
https://www.scribd.com/document/990938203/Exploring-the-Versatility-of-Nardi-Adirondack-Furniture-in-Outdoor-Settings-143948
This material at its core consists of generally a specialized polymer, often PP or heavy-duty polyethylene, despite reputable contract factories never reveal their exact recipes much like beverage firms safeguard their syrup recipes