Steel Frame Structure:
Built with a metal (steel) frame that provides strength and stability.
The steel is usually coated to resist rust, but still needs proper maintenance.
Tarpaulin / Liner Interior:
Inside is lined with a durable plastic material (often PVC), known as a liner or tarpaulin.
It holds the water and prevents it from coming into contact with the metal directly.
Smooth and skin-friendly surface for swimming.
Easy to Install and Dismantle:
Does not require permanent construction or digging.
Can be set up in a backyard or garden and taken down when not in use.