One of the latest, the Canadian-designed Airo Bike Seat, utilizes flexing "Wing-Springs" on either side.
The two outrigger Wing-Springs raise and support the rider's ischial tuberosities ("sit bones"), reportedly keeping the tender perineal area between them from pressing down against the grooved middle section of the saddle.
Additionally, the Wing-Springs independently pivot up and down as the rider shifts their sit-bone pressure from side to side as they pedal – this is said to reduce the pressure exerted on those areas, as compared to regular saddles that don't move in response to pressure. The springs are also claimed to help absorb road vibrations, making for a comfier ride.
Read the full article at NewAtlas.com