The products are made of camphor wood, a durable timber that comes from the camphor tree imported from Indonesia, which makes it suitable for outdoor environment. It's structural stable, and it has anti-corrosion treatment on the surface, which keep it from yellowing outdoor in the harsh sun. No cracking, no rotting, anti-moth, anti-sun and rain resistant. All products are built strong to last for many years and treated to resist wear from the elements, such as UV radiation from the sun.