F3 in Fellbach pairs a leisure bath with a Saunawelt of eight saunas and steam baths: a 100 °C Trockensauna, an 80 °C Aufgusssauna seating about 50, a 60 °C Biosauna, a Salzsauna, a Kelosauna of almost 60 m², a Rebensauna, an infrared room and a 45 °C steam bath, plus three more cabins in the sauna garden. Bathers cool off in an 18 °C plunge pool; the 160 m² outdoor brine pool is kept at about 32 °C. Renovation work is under way, and a sauna day ticket is 27 euros Monday to Thursday.