-Designed with a large reservoir that can be filled with sand or water to add stability-Made of high-strength HDPE material waterproof aging-resistant durable enough-Equipped with protective pads on the bottom keeping the umbrella base stable-The bottom groove can be used for storing the pole or as a carrying handle-Suitable for various occasions - patio poolside beach terrace garden deck etc-Can be easily set up or taken down no tools required-The pole can be stored on the bottom groove saving