The extra resistant walls are formed by 3 separate layers of material. The inner layer of polyester mesh is welded in an industrial manner to the two exteriors consisting of a resistant and thick layer of PVC, creating a total thickness between 0.40 and 0.80mm, depending on the size of the pool. Strong side walls in PVC and polyester The liner is supported by a rustproof galvanized frame Drainage control connectors for quick connection Features Size 4.57m x 1.07m Capacity at 90% Quick and easy assembly in 20min with 3 people