The corrosion-resistant steel frame is equipped with our FrameLink System for a sturdy and secure frame connection. The protective connectors prevent damage from rust-causing metal-on-metal contact. The sturdy DuraPlus liner is made out of an ultra-durable 3-layer material that is reinforced for strength and puncture-resistance. DuraPlus is 15% more tear resistant, 33% more stretch resistant and 83% more puncture resistant than standard PVC, ensuring your pool will last summer after summer.