The Tempo 55 lb. umbrella base is built out of polyconcrete for versatility and superior stability. Polyconcrete, or polymer concrete, is a type of concrete that incorporates polymers to enhance the properties of the umbrella base. It is very important to check the umbrella base weight requirement for your umbrella. Before assembly, decide on the location of the umbrella. Allow ample height to avoid damage to your umbrella during assembly and usage. Choose a location that is level and sturdy. Avoid any sloping or soft ground.