Lumi Home Furnishings Cordless Room Darkening Cellular Honeycomb POSH Shades are available in various width sizes. The honeycomb fabric construction is from beautifully textured non-woven polyester fabrics. Using only the highest quality of fabrics laminated by PET film that blocks most light entering the room while also providing optimum personal privacy. The innovative eco-saving cellular honeycomb fabric design offer good inside insulation making these the most environmentally friendly and energy saving window coverings on the market in support of our ecosystem. The simple Cordless Operating System is one of the most unique features; with a durable spring tension device in the head rail especially designed for a safe and easy cordless operation. To operate: simply pull down or lift the bottom rail to adjust to your desired length. They are easy to use and easy to install. All Lumi Home Furnishings cordless window shades and blinds are 100% Cordless and Child-Safe; perfectly safe to use with children and pets.