With windshield sun shades as widely available as they are now, I wanted to know how well they work. A car sun shade placed in the windshield relies on a shiny, reflective silver foil surface that faces outward from the car. Hunter Young Sun Shade Car Interior Stats for ’84 Mazda RX-7The benefits of the sun shade were apparent quickly. Hunter Young Sun Shade Car Interior Stats for ’11 Hyundai AccentHow to Use One CorrectlyUnfolding, opening, or unrolling a sun shade won’t require a master’s degree. But here we’re talking about windshield shades, and so I’d pass.