Look at the A-pillars and the clear hub caps.
From;
http://www.topspeed.com/cars/toyota/...s-ar81168.html
"Five Axis Design created a four-piece Aero Kit using polyurethane and partially recycled materials manufactured by 3D Carbon. The kit includes a front lip spoiler, side skirts, and a rear lower valance. The Aero Kit was designed and aerodynamically tested by using state-of-the-art Computational Fluid Dynamics (CFD) software by Swift Engineering to ensure the kit maintained the Prius’ remarkable 0.25 coefficient of drag".