I sew bedding and different items that shield from radiofrequency. These sre “Signal Tamers”. You put them over a wifi router to greatly reduce the radiation they produce, but it still lets it work very well. Its only downside is it reduces the range from which you can connect to the router, but usually thats actually a perk since it stops unwanted neighbors from trying to access your router and info. Just made 63 of them in a sitting.