Wear these boxers for all-day protection as for every occasion and activity. \n \nCare: hand wash, air dry, do not bleach, do not iron \n \nThis underwear is specially designed for shielding Radio Frequency (RF) radiation such as cell phone, wireless devices, microwave oven. The silver fiber fabric offers exceptionally RF shielding performance. \n \n- Information about RF Radiation Shielding Fabrics - \nElectromagnetic shielding that blocks radio frequency electromagnetic radiation is known as RF radiation shielding. The shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. \nThe principle of RF shielding is to using a conductive enclosure to block electrostatic fields. Typical conductive materials used for shielding is metal. With modern technology silver can be incorporated into fabrics and textiles made into clothing to shield our bodies.