EMF Radiation Protection Cap blocking RF EMF - Cell Towers - Smart Meters - WIFI Made with high quality material in order to block EMF. The cap is completely shielded, it reduces EMF radiation by 99.9% (47dB average). One of the best EMF protection clothing options; with a modern design with six shielded Panels and front slope. Made in Canada using comfortable internal fabric with certified Oeko Test Class 100 and 1000. Unique directional sewing technique and patching to provide the best EMF protection. Available sizes: Small: 7 1/8 inch | Medium: 7 1/4 inch | Large: 7 3/8 inch | XL: 7 1/2 | XXL: 7 5/8 inch.