SYB Air Tubes Headset does not have an EMF shielding material inside of it. It is designed using the Inverse-square law, which states that the power of EMF weakens with distance.
With our SYB Air Tubes, part-way up the cord (a safe distance from the head), the wire stops, and hollow flexible tubes take over. Because these tubes are filled with air instead of wire, the EMF is not conducted up the headset to your ear canal and brain. This is what stops the radiation from your cell phone from being conducted up to your head and into your brain.
If you have any additional questions, reach out to our customer service team at hello@shieldyourbody.com.