The extremely strong PVC odor from the package leaves no doubt about the material used. Why not use a more environmentally friendly polyethylene manufacturers remains a mystery. Now to the pool, the building is fairly straightforward, although all pieces are deformed by the tight packing and the plug difficult to fit. Why a very large opening for the Aufblasering was used, can only explained by the fact that one should to buy the pump by Intex. Heine Commercial foot or hand pump fits. Unfortunately, the ports are not standardized for the filter system without tinkering is because almost nothing. No socket to connect hoses available, you have to use short plastic pipes as adapter. The material as a whole is well made but not particularly strong. The price just reasonable. Let's see if the pool is used by more than one season.