"Cell phones (including smartphones) give off a form of energy known as radiofrequency (RF) waves, so some concerns have been raised about the safety of cell phone use. With respect to cancer, concern focuses on whether cell phones might increase the risk of brain tumors or other tumors in the head and neck area."
When RF current is attenuated, or dampened, by NixRay’s multiple layers of Faraday material, this reduction is measured in decibels, or dBs. This reduction scale is logarithmic. For instance, if a shielding fabric has an RF current attenuation rating of -3 dB, it will block 50% of RF energy. A fabric with a rating of -6 dB will block 50% of 50%, allowing only 25% of RF penetration.