The laminated polyester is made up of successive layers of fiberglass and resin. It forms a layer of 2 to 3 mm, which is thicker than a reinforced membrane. The finish is ensured by a double layer of resin tinted in the mass: the GELCOAT. With real effectiveness on the aesthetic level (it shines, it's beautiful) and practical (watertightness, neutralization of structural defects, resistance to the passage of time), it is the thickest coating of swimming pool coatings. It is very sturdy and suitable for all pool shapes.