EMF Protection Beanie, Silver Fiber Anti Radiation Breathable Cap, 5G 4G RF WiFi Shielding Hat,Khaki

Scientific Principle: The inner lining of each hat is woven with silver fibers to shield radio frequency and microwave electromagnetic fields, which ensures high shielding attenuation (shielding). Full Coverage: Unique directional seam technology and maintenance to provide better electromagnetic protection. The lining of the whole hat is made of our shielding material, creating 360 degree full coverage for your whole head! Good Elasticity: The outer layer is 98% wool; lining: 25% silver fiber and 75% nylon elastic fiber, not easy to deform, soft, breathable, warm, fluffy, light-resistant; very comfortable. Powerful Protection: Protect your brain from up to 99% harmful EMF/EMR radiation and WiFi routers, mobile phones, Bluetooth and laptops, as well as 3G, 4G, 5G, mobile towers, cordless phones, high-voltage wires, airports or military radar attacks. Easy to Use, About Washing: Washing at room temperature, without machine washing, washing alone, avoid pollution, cool and dry, avoid deformation after drying.