Back to the Future!
Hang gliding started out with most everyone flying sitting in a swing seat. Then they all went prone (and a neck pain).
I wanted to get back to the upright seated position so I developed, in conjunction with High Energy Sports, a 21st century version of the old swing seat. The "Colver Swing Seat Harness".
In this brief video, Erika a 120 pound pilot in a huge 330 sq ft Condor hang glider, shows the comfort and the high degree of control in this seated harness.