Calyx special jets, which can be closed or directionally-adjusted, are at the heart of the beneficial massage that water has on the body. Here the Venturi effect creates a water/air mix, with oxygen-enriched bubbles of 4 mm in diameter, for delicate and effective hydromassage that does not damage capillaries. As the result of research on the human body and ergonomics, the jets (from 6 to 8), are positioned to encourage blood flow from the peripheral to the central area. 20 minutes a day at a temperature of 36-38°C is enough to discover the well-being of 4 different systems of Calyx hydromassage.