By 1975, both the University of South Florida and the University of Florida in Gainesville had decided to build new on-campus indoor sports facilities. The two schools pooled their resources and shared the cost of a basic arena design to stretch limited state funding. The "core unit" of the Sun Dome and UF's O'Connell Center were nearly identical, and they each featured a flexible, inflatable roof made of Teflon and supported by a system of blowers. However, the O'Connell Center included facilities for other sports around the main arena while the Sun Dome as originally built did not. These were added in later expansions.