Q - 1. Why are you using the SHIELDON 240 fabric in all your hats and clothes, while there are other RF blocking fabrics that can block better than what the SHIELDON 240 fabric can.
A - The reason is that the SHIELDON 240 is the best fabric we have. It has a good blocking ability, it is very durable and will last for years
The SHIELDON 240 is the most durable fabric we know of.
You can wash it in a washing machine and it will not suffer any reduction in it's ability to block Radio Frequency radiation.
It will last for many years and will require no maintenance.
When you buy expensive RF protection clothes, using the cloths for many years is a big plus!
The SHIELDON 240 fabric has a blocking effect of more than 99% (higher than -20 dB tested for Frequencies of 10MHz to 3 GHz) which is enough for making cloths and hats (more RF will come in from the opening of the hat or cloth, than trough the fabric it self).
Other fabrics may have higher blocking effect, but they are not as durable and after several times you wash them, the blocking effect will go down, sometimes for more than 50%, sometimes even farther down.