● 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 space easy to transport