These blackout panel track blinds are designed for sliding doors, patio doors, large windows, and room dividers. Made with durable polyester fabric and a blackout coating, they block up to 99% of incoming light for privacy and light control. The extendable track adjusts from 45.8" to 86" wide, and the panels can be trimmed for a better fit. A top valance conceals the track for a clean, modern appearance. Smooth gliding operation and dual stack options add convenience for everyday use.