The surface is created with the Artstone blended stone and resin composition， forming an earthy texture while remaining sleek in shape. Plants can pull up water with less frequent watering. For outdoor use， the base of this planter is slightly elevated and contains a removeable rubber stopper. Constructed of lightweight and waterproof blended stone and plastic material Built-in water-minder reservoir keeps plants hydrated and happy Footed bottom promotes airflow to prevent root-rot Plastic resin Made in USA Your security is our number one concern