This is a great way to help you decide which EMF shielding fabric works best for your needs. If you purchase this A4-size pack of 4 EMF protection fabric swatches, you can test their efficacy with an EMF meter.
Hold the various (labeled) pieces between your EMF monitor and the high-frequency EMF radiation source. Check the EMF readings on your EMF meter with the relevant sample. That’s it! Your EMF shielding material is chosen, and you know it works for your specific EMF Protection project.