Manufactured from advanced EFTE material for greater heat and water resistance. I charged my phone (Sony Xperia X) with this pad the first day and it went from about 40% to 80% in about an hour. Not bad for a 30W panel. The panel is very stiff and looks like a solid construction, but still folds and unfolds well. (Probably like breaking in a new pair of shoes.) It comes well packaged and includes 4 carabiners for hanging if desired. I plan to keep it in my car for emergencies or trips.