100% Polyester Darkens Room for Sounder Sleep: These blackout curtain panels use a thermal lining fabric that eliminates 100% of light, creating a dark, relaxing sanctuary for sleep as well as privacy. Energy Efficiency: Your blackout panel curtains help you stay toasty warm during the cold winter nights and cool on long, hot summer days. You could even save on your home energy bills. Thick, Premium Fabric: Made of sturdy polyester material, these long, classy drapes feature a high-quality design that won't fade in the sun or after a few washes. Durable Metal Grommets: Each curtain panel features eight gunmetal grommets that are much sturdier and longer lasting than flimsy plastic ones. They also add a sophisticated finish. Each package contains two (2) window curtain panels.