Three-layer blackout roller shades with suction cup mounting provide effective sun and UV protection while preserving privacy. The three-layer design blocks sunlight and harmful ultraviolet rays, helping darken the room and create a safe, cool, and comfortable living environment. It also offers strong privacy protection to prevent strangers from prying eyes. Retractable and easy to operate - The sunscreen sunshade roll up blind features an automatic retraction function. To use, simply gently pull the hook under the roller blind, and it retracts quickly and smoothly. - Lightweight and compact, it occupies little storage space and is easy to carry. High quality materials and durable construction - Made from high quality silver titanium fabric that is soft, wear-resistant, waterproof, moisture-proof, and antioxidant, and easy to clean. - Top aluminium alloy bracket provides strength and durability; bottom rail uses PE hooks for reliable operation. - Designed as a practical option for home roller blinds. Non-destructive, easy installation - Fixed by suction cups, so no drilling holes in the window is required. - Installation is simple and convenient, and there are no traces left on the window when dismantling. - Includes nano adhesive, which can be used with suction cups to further improve solid fixation and reduce risk of falling off. Use scenarios - Bedrooms or living rooms requiring blackout and privacy for TV viewing, rest, or work. - Rental homes, dormitories, or other spaces where drilling holes is not permitted or desirable. - Windows in kitchens or damp areas where moisture resistance and easy cleaning are beneficial, and where a temporary, adjustable shade is advantageous.