Sun Company Featherwight Signal Mirror | Lightweight and Compact Backpacking Mirror LIGHTEST MIRROR AVAILABLE - At just 0.3 oz, Featherweight mirror is the lightest mirror you will find. FLEXIBLE CONSTRUCTION - Sturdy metallized acrylic construction makes featherweight mirror nearly shatterproof. SIGNAL AND HANGER HOLES INCLUDED - Hang the mirror from a lanyard with the hangar hole. Use signal hole in the center of mirror to assist in signaling. SIGNALING INSTRUCTIONS INCLUDED - Quickly learn how to properly signal for help in a survival situation.