Polyester Imported DETAIL INFO: Each package comes with 2 blackout curtain liners. Each panel is 50" wide x 80" long. The length excludes the rings and the taps. The 1" tabs hold the 1.48" diameter rings but can have a thinner rod run through them as well. DETACHABLE RINGS: These 16 pieces of bonus rings that come with the liners snap open for easy hanging and removing on an existing rod. Besides, these silver rings hide perfectly behind the grommet rings of the existing curtains. FABRIC & FUNCTIONS: No formaldehyde, no chemical coating, no pungent smell, high-quality material is safe for babies and small kids. Blackout curtain liners block out sunlight, harmful UV rays, noise, and heat while offering privacy. HOME DECORATION: These blackout curtain liners used with blackout curtain collocation USES can achieve full shading effect, used with sheer curtains can make the room darkening. Besides, unlike other liners with hooks, these liners don't hurt to your existing curtains. EASY MAINTAIN: Good materials make sure the curtains are lifelong reliable. Machine washable for easy maintenance. Washing them below 86/30 water, dryer or tumble dry. Iron them in low temperature if necessary.