【Excellent Blackout Material】Crafted from 100% blackout polyester fabric with a matching color coating, our TOVALOR cordless roller shades offer a sleek, modern look with exceptional durability. The thermal backing blocks out all sunlight, providing complete light control and ensuring privacy. Finished with sturdy, e-coated aluminum top and bottom rails, these shades feature a smooth, natural finish that seamlessly complements any room décor. 【Safe Cordless Operation】Designed for homes with children and pets, our cordless shades feature a spring-loaded mechanism for smooth, cord-free operation. Easily adjust to any height with a gentle pull, and they retract effortlessly—combining both convenience and safety. 【Comfort & Versatile Use】Keep rooms comfortable year-round with thermal-insulated shades that help regulate indoor temperatures. By blocking summer heat and retaining warmth in winter, these blackout shades reduce energy bills while creating a quieter, more private space. Great for living rooms, study rooms, kitchens, nurseries, and more. 【How to choose the right size】:For Outside Mount, to cover the entire window, choose a shade that is 4 inches wider than your window. For example, if your window width is 30", order a 34" shade. For Inside Mount, At least 2 inches of frame depth are required for inside installation. If your window width is 30", order a 30" or slightly smaller shade. 【NOTE】: The fabric width will be 1" narrower than the size of the shade. The shade adjusts from 0" to 72", fitting window height within this range. 【Installation Kit & Support 】The package includes all essentials for easy setup,with friendly customer service available to assist and ensure a smooth experience.If you’re missing accessories or have any issues, our team is here to help.