【Excellent Light Filtering Fabric】100% polyester non-woven fabric. Color is the same on both sides. Light Filtering, Thermal Insulation, UV Protection, Privacy Protection and Noise Reduction. Great choices for living room, office, kitchen, sliding glass doors. 【Upgraded 1.8" Single Honeycomb Construction】Persilux 1.8-inch diameter honeycomb shades can better dissipate the heat and resist the cold for greater energy efficiency. They are more beautiful when folded and provide a stylish look at the windows. 【How to choose a correct size to fit? Example your window meas 23" width by 72" length.】Inside Mount: window width is blind width, window height is blind height. Blind Width=23"; Blind Height=72". Outside Mount: Plus at least 4" is blind width, plus at least 4" is blind height. Blind Width=23"+4"; Blind Height=72"+4".【Pls Note】Fabric width will be 0.16" shorter than the size of the shade. 【Child Safty Cordless Design】Persilux honeycomb shades are designed with smooth and quiet glide spring system provides a clean and tangle-free look and creates a safer environment for both children and pets. It will stay at whatever position you stop and can be easily raised or lowered with the handle.【Pls Note】 These are bottom-up only. One telescopic draw rod for cordless blinds included in package. 【Customized Service and Shipping】You can click "Customize Now" on the page to find more size choices. We will confirm the details with you after we receive your order, if we do not get any reply for a long time, we will make the size without any adjustment.【Custom Color of the Headrail and Bottom Rod】Two color options for headrail and bottom rod on customized page. We appreciate your precise measures & careful orders. Persilux Cellular shades are fabric shades with a honeycomb construction that provide energy-efficiency and a stylish look at the window. It can keep your interiors comfortable throughout every season; use natural sunlight to warm rooms in the winter and block harsh sunlight in the summer, all while lowering your heating and cooling energy costs. Our honeycomb shades are designed with smooth and quiet glide spring system provides a clean and tangle-free look and creates a safer environment for both children and pets. It will stay at whatever position you stop and can be easily raised or lowered with the touch of a finger. PLS NOTOE: These are BOTTOM-UP ONLY. It is worth mentioning that the aluminum valance and bottom rail is weighted and rigid so it hangs flat and prevents from wind blowing. Besides, our cellular shades are easy to clean, because it’s anti-static, there is less dust on the fabric. Use a vacuum cleaner to suck gently, and then wipe it with a paper towel. They are available in a large array of colors. You can purchase fabric swatch before you place an order if you're not sure what color you like.