On a budget but looking for quality and a spa that you can count on? A Discovery Series Spa may be the right hot tub for you. These spas are built for ruggedness and durability. The biggest difference in this series from the others spas you have seen is the shell. Unlike most spas on the market, this hot tub shell is not made of acrylic but a new material called PolySteel. It is a material designed to last forever and be impervious to even the most intense abuse and chemicals and harsh conditions. This is what sets this spa shell apart from all others. With the spa light on and the jets gently massaging your muscles, your spa is transformed into a relaxing tranquil aquatic oasis!