Docooler Window Film for Household Insulation with Sunscreen Explosion-proof One-way Reflective Tint Membrane In winter, the window film can reduce the interior heat to keep warm. Protect your furniture, household appliances, such as computers, stereos, televisions, furniture and so on. Has a good effect of single vision, protect your privacy. Fix debris for harm reduction. Provide excellent heat rejection with a stylish and classic appearance.