Retractable Car Windshield Sun ShadeEasy to Install: Blackout window covers can be easily installed and removed without drilling holes or any damage to windows or walls using suction cups. Heat Insulation: Portable Blackout is made of thick oxford cloth and insulation that effectively blocks harmful sunlight and reduces outside heat and noise. lightweight material: Made of durable PVC material, it is lightweight and covers your windows so you don't need to worry if your kids will be