Blackout curtain liners Used by hotels and hospitals for 30-plus years, the Roc-Lon blackout drapery liner is indispensible in the home, too. It blocks light and reduces noise for more peaceful sleep, protects furniture from sun fade, improves TV and computer clarity, reduces glare, and insulates against heat, cold. Great for nappers, seniors, home offices and general household use. Can be used with almost any curtain or alone, as a drapery in its own right. Earth friendly - Saves an averag...