1. Blackout curtains use three layers of weave technology, Impedes sunlight and UV ray (Dark color curtains work better). Perfect drapery option for anyone seeking to block daylight, take a nap, or keep sun glare off your TV. 2. Light Blocking Energy Savers: Having the heavy, multi-layered microfiber blackout window curtains, helps reduce and control the amount of heat that enters and leaves the rooms, remains warmer in wintertime relieves the strain on home heating, reduces energy budget 3. Two Types, The first type has a shading degree of about 95%; the second type has twice the thickness of the first type, and the coating quality is better and more durable. The shading can basically reach 100%, no washing, and the surface of the fabric is smooth and not easy to stain. 4. Our energy saving curtains insulate against summer heat and winter chill to balance your room temperature, cut down energy bills. Reduce outside noise, protect floor and upholstery from color shading. 5. Specification Material: Polyester Color: Silver Size: 1 x 1.4m / 1.4 x1.8m / 1.4 x 2m / 1.9 x 2m / 2.8 x 2m Package Includes: 1 x Blackout Curtain