 They featured a completely circular or nearly circular design, and accommodated both baseball and football by rotating sections of the box seat areas to fit the respective playing fields.These fields often used artificial turf, as it could withstand the reconfiguration process more easily or be removed for nonsporting events.Furthermore many of these stadiums were either enclosed domes (where natural grass could not grow without sunlight) and/or located in cold-weather cities (where undersoil heating was expensive and unreliable), and prior to the development of hybrid grass and improved natural grass cultivation techniques, artificial turf seemed to be the best solution at the time.