Our EMF shielding fabric consists of a special copper mesh that shields against high-frequency electromagnetic fields (EMF) and radio-frequency (RF) radiation. The mesh reflects and absorbs the radiation, forming a barrier between the source of radiation and the user. It effectively shields against a broad frequency range, which also includes the frequencies used by mobile networks (5G/4G), Wi-Fi, Bluetooth and other wireless technologies. The shielding effectiveness is measured in decibels (dB) and is specified on our product.