This is the hotel-grade curtain liner that blocks drafts, excessive heat, light, and sound and installs behind any style drape without adhesive or stitching. The insulating liner is constructed from a machine-washable cotton/polyester blend backed with acrylic suede that provides a barrier against wintry drafts and high temperatures caused by summer heat or western exposures. The luxuriously thick fabric also muffles noise and is impenetrable by light, making it ideal for bedroom use. It hooks to standard curtain rods for invisible, non-damaging installation behind grommets, pinch pleats, and most other styles of drapes.