Polyester 【Soft Light Filtering & Total Privacy】Experience the dual benefits of softened natural light and unwavering privacy. The special fabric of these cellular shades gently filters harsh sunlight into a soft glow, ensuring your space is filled with natural light without compromising your privacy from prying eyes.The unique honeycomb cells trap air to reduce noise and maintain room temperature, helping you save energy year-round,making them the ideal choice for modern home decor. 【Flexible Inside or Outside Mount - Perfect Fit Guaranteed】Our cellular blinds offer two easy installation options. For a sleek, built-in look: choose Inside Mount (recommended shade width = window width - 0.25"). For maximum light blockage and to cover imperfect windows: choose Outside Mount (recommended shade width = window width + 4"). Minimum 2-Inch depth required for inside mount.Screw-mounted. Permanent stability. 【Ultra Safe Cordless Design - Perfect for Kids & Pets】Engineered with family safety in mind, these cordless honeycomb shades eliminate dangerous dangling cords, creating a worry-free environment for your children and pets. Simply push up or pull down on the bottom rail for smooth and effortless operation. 【Durable Fabric & Easy Maintenance】Crafted from high-quality, durable polyester that resists fading and wear. These blackout shades are built to last and are incredibly easy to clean—just gently vacuum or wipe with a damp cloth. 【Custom Size Available - Perfect Fit for Any Window】We specialize in creating custom-sized cellular shades tailored to your exact window dimensions. For custom orders, please refer to these ASIN：B0FMFDBC59 and B0FMFCW5CM. After ordering, we will reconfirm measurements to ensure your shades for indoor windows fit perfectly. If you have any questions during the customization process, our support team is here to help within 24 hours.