Great for versatile venues with indoor and outdoor seating, the emu 9008 stacking side chair can be used in dining rooms and on patios. The seat and back are made of polypropylene, while the frame is aluminum and polypropylene. The plastic is durable; however, it can degrade quickly in direct sunlight. Because this plastic comes in green, orange, and black, it draws attention to dining areas. To save space in dining areas, the chairs can be stacked with other units.