Built With TitanRF Faraday Fabric, Offering EMF Protection TitanRF Radiation Shielding Blackout Curtains combines quality materials and innovative radio frequency (RF) shielding technology. The main function of the curtains is to act as a barrier between the inside of your house and RF signals, such as harmful electromagnetic frequencies (EMF) coming from cell phone towers, smart meters, and other outside sources. On the back side of these curtains is a unique material called TitanRF Faraday Fabric. This fabric provides the electromagnetic shielding capability of the curtains, and we have included two layers for maximum protection. The high-shielding material is used by military worldwide to block signals, and is backed by extensive laboratory testing. To use, simply hang the curtains in your window, doorway, or desired location to reduce your exposure to radiation. Additional Benefits Additional benefits of the "blackout" curtains includes reduced light and noise, as well as increased privacy and energy savings, since they trap heat in during the winter and keep light and heat out during the summer. All of the features combined aim to offer a better night's sleep. Metal grommet rings across top rim (1.6" interior diameter fits all standard curtain rods) Signal blocking TitanRF Faraday Fabric lines the window facing layer Luxurious 100% polyester material shows on the room facing side Beautiful packaging perfect for gifting Includes a sample of fabric layers Two curtain panels in each set (multiple sizes available)