【New way of Magnetic Fasteners】2023 upgrated version Blackout Blind use new way of strong Magnetic board to fix on. these magnets Boards consist of 2 parts, including a plastic backplate with 3 neodymium magnets and a stainless steel backplate with adhesive tape; Each part can be tightly connected together to easily fix the blackout blind. this Scientific Structural Design is very fit for daily use and can stay up all the time. 【Better Sleep for you 】100% blackout pitch black guaranteed. our Blackout Shades use with thick, durable but soft materials polyester fabric can block 100% sunlight and UV ray, special silver-grey coating behind the blackout blind can reflected light and lsolation temperature and the front black polyester fabric can block off and isolated light,creating a cozy pitch-dark sleeping atmosphere for you, Improve your sleep quality. 【Large Size for Several Curtain】it can fit any window or door perfectly,Extra large size (300x145cm / 118”x55”) blind cut to fit several window of any size and shape; Lightweight material means it can be cut down by yourself so easily 【Quick Fit & Solid】Measure > Cut > Stick the iron sheet > Magnet Board fix on. Please take down them carefully 3) when you want to take off the blind, please rotate the Magnetic board to weaken the strong magnetic, it is easy to take off Portable 100% Blackout Blinds (300cm x 145cm) Blackout Shades window blackout cover Temporary blackout curtain