Easy assembly without tools. Integrated drain valve for connecting to the garden hose (adapter included). Repair kit that can be used underwater. The lining of this pool is made of Tritech™, a reinforced material consisting of a polyester layer surrounded by two extremely resistant layers of PVC. The overall thickness of the liner varies from 0.40 to 0.80 mm, depending on the pool dimensions, and offers extreme resistance and a very long life. Corrosion-resistant metal construction. Easy disassembly for wintering. The rectangular shape allows for the largest possible swimming and bathing area.