Genuine anti-electromagnetic radiation 50% silver fibre mask.
Silver fibre double-layer radiation protective mask: 50% Silver fibre masks (Inner fabric: cotton; Specific composition of outer fabric: 50.6% polyester fibre, 49.4% silver fibre) Frequency range: 30MHz-18GHz Shielding effectiveness: 33.8dB-51.3dB
Due to demand, it takes us around 4 weeks to make a mask. Please be patient. It is well worth the wait.