Made of high density heavy blackout fabrics which can block out almost all lights when daytime or night which is effectively ensure the privacy and safety of everyone. It is good choice for all the glass window on the doors of front doors/back doors/ patio door/front porch, study room, kitchen room as well as living rooms and bedrooms which are face or opposite streets and roads, and it is also important for classroom doors. It is easy installed with stiff Velcro even can be finished in 3 minutes with no drill, no punch to destroy your doors or add any permanent hardware. Variety sizes and colors are available to suit your requirement.