Anti-Radiation EMF Electrosmog Shielding Mask Protect face skin 8900672 Shell: 50% silver-nylon blend, 50% cotton; Lining: 100% cotton Imported Effective RF shielding performance to 3GHz and beyond Fabric: 50% silver-nylon blend, 50% polyester; Line: 100% cotton Wear this mask to shield RF radiation such as cell phone, wireless devices, microwave oven Size: 7.2 x 3 inch (18 cm x 8 cm), opening fold: 7.2 x 6 inch (19 cm x 15 cm) Color: Grey Care, hand wash, air dry