Material and shielding - Made from copper, nickel, and polyester fiber. Certified to provide 99.999% shielding effectiveness. Fabric offers good conductivity and shielding. Design and use - Two-side opening. You can adjust blocking strength by opening or closing sides. The closer the opening, the stronger the shielding. - You can tie the two open sides to close the cover for complete enclosure. Coverage and compatibility - Easy to use. Simply cover the router completely, including the antennas, to achieve shielding. - Fits most Wi-Fi routers with or without antennas. Lightweight and easy to carry for travel or different settings. Breathability and performance - Breathable EMF protection fabric allows natural airflow for cooling. Usage guidance - Wrapping the entire router may affect WiFi signal. We recommend wrapping only the antennas when using WiFi, and wrapping the entire router when sleeping or outdoors. - Not advised to wash the cover. Use scenarios - Home or office: reduce EMF exposure while the router is in use. - Travel or hotel stays: portable protection in unfamiliar environments. - Sleep or outdoor use: shielding while resting or outside.