Bestway Fast Set Pool has heavy-duty PVC and polyester 3-ply sidewalls. The extra strong side walls of this pool are constructed with Tritech, a 3 layer reinforced the material with a polyester mesh core encased between two layers of high gauge PVC material. This creates a total thickness of 0.40-0.80mm (16-32 gauge) depending on the size of the pool, offering superior strength and durability. Features are underwater adhesive repair patch, the liner is supported by an inflatable top ring and easy to take down for off-season storage. It is maximum water capacity 3800 Litre.