THE POOL WALLS ARE CONSTRUCTED WITH DURAPLUS, A MATERIAL REINFORCED WITH A POLYESTER MESH CORE AND TWO LAYERS OF HIGH GAUGE PVC FOR SUPERIOR STRENGTH AND DURABILITY,FRAMELINK SYSTEM - CUSTOM-MOLDED T-CONNECTORS PREVENT METAL-ON-METAL CORROSION,REALISTIC PRISMATIC STONE PRINTING PROVIDES THE POOL WITH A BEAUTIFUL PRINT THAT ADDS TEXTURE AND A RICH BLUE COLOR TO THE INNER LINER,EASY 20-MINUTE SETUP,HEAVY-DUTY PVC AND POLYESTER 3-PLY SIDE WALLS PROVIDE ADDITIONAL SUPPORT,ROUND SHAPE MEANS EASY IN