ShiftShade for BIG WINDOWS - Improve sleep with the Easy to Install, Non-Permanent Total Blackout Light Blocking Shade for Windows. This version fits Windows from 39" to 48" wide and up to 72" tall. Polyester & Polyester Blend Made in USA Provides 100% Light Blackout - Designed and made in the USA Simple Installation - No Hardware Needed* Use with Existing Window Treatment Sound and Thermal Barrier Provides Total Privacy