1. Blackout, UV protection, noise reduction: This roller blind is made of polyester fabric, which is soft and smooth, thickened and encrypted, more durable, has good sun protection, will not turn yellow or crack due to sunlight, provides blackout and UV protection, giving you a comfortable space. The curtain upper rod has a builtin sounddeadening device, with the volume below 45 decibels, giving you a perfect and stable sleep. 2. Cordless Design Spring System: The cordless design of the curtains provides a clean, tangle look for windows and creates a r environment for children and pets. The builtin high elasticity spring can withstand over 6000 lifts, can be rolled up smoothly and steadily automatically (with adjustable speed), and it can be stopped at any time in any position for different levels of shading. 3. and moistureproof privacy protection: The cordless roller shade is waterproof and stainproof and can be easily cleaned with a damp cloth, a feature that makes it ideal for use in kitchens and bathrooms. And it's not only perfect for darkening rooms at any time, it can also be used as a privacy screen to ensure undisturbed access, suitable for bedrooms, living rooms, offices, studies and nurseries. 4. and sturdy design: Onepiece thickened upper rod is stronger, antibreakage and antifall; PVC counterweight lower rod provides more stable hanging and keeps the curtain from swaying. Builtin installation should ensure that the frame depth is 2.6 inches or more; to ensure coverage of the entire window, the exterior curtain needs to be 6 inches wider than the width of the window. (Note: the width of the cloth will be 1 inch narrower than the total size)