If you're looking for an inexpensive portable basketball system with superior performance, the Fusion system is just what you're looking for. This inexpensive portable basketball system is a great investment. It is designed with a Makrolon?polycarbonate playing surface which is virtually unbreakable, a Slam-It?rim with spring-back action, and easy one-hand backboard height adjustment. With Lifetime's portable basketball goals, you can buy one today, use it today-no waiting for concrete to dry! Portable base is filled with sand or water to provide the necessary stability. Water is easier to manage as far as filling, moving, and draining the base. Sand provides more rigidity, is more suitable if you want your system to withstand higher winds, aggressive play, and leaking. Like all Lifetime products, our basketball goals are built to last.