【100% Blackout Blind】 Blackout blind is made of high-quality high-density oxford cloth, one side of black out stick blind is durable and soft black fabric, which can effectively absorb heat and filter uv rays, and the other side of blackout material is coated with high-quality double-layer silver PU, which can better reflect sunlight and adjust room temperature, with the window blinds no drilling, the 100% dark room will give you a stable sleeping environment.【Large Size DIY】 The size of black out blind is 300*145cm, the extra large size means you can cut temporary blackout blinds to the size and shape you need, we have included a tape measure and a marker pen to help you with this step. It is recommended to reserve 2-3cm when cutting, which can perf.