CORDLESS DESIGN: The cord-free design provides a clean, tangle-free look to the window and creates a safer environment, it will stay at whatever position you stop. The bottom aluminum rail is weighted and rigid so it hangs flat and prevents from blowing SMOOTH & QUIET GLIDE: Our constant force spring-loaded mechanism makes the shade easy to raise and lower and can stay balanced automatically. Our patented spring winder inside avoids the rebound or sagging, you can buy it with confidence PERFECT BLACKOUT EFFECT: Made of thick non-woven fabric and built-in aluminum foil coating inside the honeycombs, it's super private looking from outside even at night with the light. Also the cordless shades can block out sun and heat, which will make your life more comfortable DELICATE MATERIAL & CRAFTSMANSHIP: Our honeycomb shades will dress up your room with these pleasing pleats, which will not stay flat even when you extend the blinds to the full. Also the fabric is soft to the touch and durable, and not easy to collect dust ONE YEAR WARRANTY & BEST SERVICE: Changshade offers one-year warranty, you can buy the cellular shades with confidence. We always think for customers firstly and try our best to provide you with the best quality products.