This square fiberglass hot tub with jets is our absolute bestseller. Hot tub with bubble jets Quattro is made of durable and environmentally friendly fiberglass. Such fiberglass is also used for the production of swimming pools and sailing boats. The materials we use are not hazardous to one’s health. The advantages of such a fiberglass hot tub compared to a wooden one are that it is easier to maintain and it has a significantly longer service life. Cleaning is very simple and you can use a wide range of detergents.