Bestway My First Fast Set Swimming Pool (60 inches by 15 inches)Recommended Age: 2 years and above Easy set up Heavy duty PVC and polyester 3 ply side walls Underwater adhesive repair patch The extra strong side walls of this pool are constructed with Tritech, a 3 layer reinforced 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 3