Patrick Dempsey was a Serengeti brand ambassador in 2007. Among the sunglasses he was endorsing, are the Serengeti Sangro aviator sunglasses as sees on the promotional photo on the left (click on the image to see the whole photo).
What is S-Flex? The "S" shaped temple design working with the strength of monel and beta titanium, provides a double action movement without using a traditional spring hinge. This unique design provides just the right amount of tension to ensure a comfortable, secure fit that is remarkably lightweight and durable.
Available in Espresso (6997), Gun Metal (6999) or Satin Black (6998) frame, with Drivers or Drivers Polarized lenses.
Reference: Serengeti Sangro S-Flex - Color: Satin Black, Drivers Polarized (6998)