Flexible and conformable film, Sunshade, acts as thermally insulating, broadband electromagnetic window that protects satellites from solar radiation. Available in large format for coverage of up to 2.5 x 10 ft areas, thin film solution controls temperatures passively, can transmit high-speed data (RF transparent), and allows static charge to bleed off. Construction features with non-metallic coatings tailorable for front/back surfaces to provide stress balance and emissivity control.