http://www.papp-up.com/store/papp-uv
Dear Shaded Viewers,
I haven't seen these for real but they look good in photos and the price, 29.90 EUROS, is astonishingly low for a sustainable product made in Germany. They are made from one piece of wood and cardboard, they can be used like a bookmark or stored in your pocket without creasing or tearing. Aluminium plates are attached at the end of the frames so that you can adjust them to the shape of your head. The labeled eyelets on the frame reference the classic cardboard industry that PAPP UV is happy to acknowledge.
Later,
Diane