(Eco friendly)EMF/RF Shielding Apron-Multi Brown-Shieldgreen Washable High Shielding Stainless steel wire fiber(No metal plating, No nano metal & heavy metal pollution) / Made in Korea Shielding performance Max 99.99% (1.5GHz) /Shielding: LF(Low frequency electric fields) & HF(High frequency electric fields) Shielding side:Eco-friendly Stainless steel wire fiber(25%)+Cotton(41%)+Polyester(34%), Other side: High quality compact cotton size: 31 x 34 inches (79 x 87 cm) This apron does not shield magnetic field. It does not block all the frequency bands of the phone but reduces the signal.