The Siesta Ares Outdoor Barstools are made of durable weather-resistant resin reinforced with glass fiber. With this barstool, you won't need to worry about any metal parts rusting, or moving parts breaking. Made for commercial durability, these barstools are stackable and are perfect for heavily used areas, such as hotels and restaurants. With UV-treated resin material, you can easily clean this barstool set with a wipe-down or hose down. This barstool withstands outdoor temperatures in summer and winter, so you can use them indoors or outdoors!