sunblind

noun

1. A blind used to protect against the sun.

   “Folding blinds are fitted to the cab bulkhead windows and sunblinds at the driving windows.”

   “The view, of course, is wonderful - provided you are one of the lucky ones with a seat; a sunblind is draped over the tops of the windows, which are not very deep, so that standing occupants of the saloon have to bend double if they want to see anything more than the permanent way.”