Lumi Home Furnishings Cordless Room Darkening Cellular Honeycomb Shades and Blinds are available in a variety of 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 fabric design offers good inside insulation making these the most environmentally friendly and energy savings window coverings on the market in support of our ecosystem. The push-button Cordless Operating System is one of the most unique features; located inside the bottom rail with a durable spring tension device especially designed for simple, safe and easy cordless operation. To operate simply press the button located on the bottom rail and gently pull down or push up to desired length. Cordless DIY (Size-at-Home) Cellular Window Shades made by Lumi Home Furnishings are easy to resize and easy to install. If resizing is needed, simply cut down the shade (equally from both sides) to fit any required window width using a heavy duty utility knife (not included) while using the resizing cutting guide tool included. This cellular honeycomb window shade is 100% Cordless and Child-Safe; perfectly safe to use with children and pets.