The Bestway Steel Pro Max™ Pool Features An Extremely Sturdy Steel Tube Frame, Which, Together With The Rustproof Coating, Ensures The Stability And Durability. This Pool Is Made Of Tough Tritech™, A Material Consisting Of 2 Layers Of Pvc That Coat A Polyester Mesh Inside, With A Strong Pvc Foil Placed On The Bottom Of The Side Walls.