This handy laptop cloth protects you against the influence of EMF radiation.
How often are you not comfortable watching Netflix or youtube etc. with your laptop or ipad on your lap? In the meantime, you are in direct contact with the device. Why are you exposed to this radiation? No need!
You simply place this handy cloth between your body and the device and you are safe.
As soon as you wrap a transmitter / receiver in the fabric, it will scale up at all times to still reach the WiFi or the transmitter mast. This is dangerous and gives more radiation. The only way to test this is to wrap a measuring device in the fabric and then leave the mobile out.
The meter will not turn off because it is not measuring.
Your body is fully protected as soon as you put the laptop cloth on your lap as a buffer between the device and your own body (you are not a transmitter / receiver, fortunately).