Phone Radiation Protection Cotton Fabric (Wear) 100 x 150 centimeters Attenuation: 29 dB at 900 MHz Easy to wash, cut and sew Raw materials: 90% cotton, 9.5% copper, 0.5% silver Certificates: ko-Tex 100 Class 1 (gentle enough for baby underwear) Shielding from cell phone towers, DECT, other wireless devices