Fiberglass pools have been successfully manufactured and used in Europe and the United States for many years. Fiberglass pools offer many advantages over other pool construction techniques. They are the most cost-effective pool construction technique. Fiberglass pools are made from a composite material blending fiberglass and polyester. They are manufactured as a single piece, a monoblock. Thanks to their composite structure, they have a tensile strength four times greater than steel, and thanks to their flexible monoblock structure, they have a long lifespan of up to 50 years.