The Intex Rectangular Ultra Frame Pool is perfect for lap swimming and pool games. In addition, it makes them a classy addition to the backyard. This new frame with its unique shape is stronger than traditional rectangular frames. And it's easier to assemble, the new shape allows for the pieces to fit together so smoothly and securely with no additional locking pins, which means a cleaner, better looking pool than our traditional metal frames. Maintenance is incredibly easy since sand only needs routine back washing and sand replacement every 5 years