Protection&Shielding Faraday Fabric 44" x 36" + Extra 50" Faraday Tape! EMI, RF&RFID Shielding Fabric, Military Grade Certified Material Blocks Signals (WiFi, Cell, Bluetooth, RFID

Was surprised this worked so good, wraped it round my phone then no signal, wraped it round my router again no signal, then tacked a sheet over the front of my electric box where the smart meter is, and it blocked that signal as well. The smart meter was pinging every 10 seconds at about 200 on my RF detector, so glad to see that gone. I now turn my router off as now have ethernet connections so no Wifi RF signals at all in the house, well only very week signals from neighbours but they are so week they should not be a problem.

Scamtastic rubbish, doesnt work, cant be bothered to send it back, dont buy this product.

Performs as advertised. I made a few pouches out of it for my phone and for some friends. It was super easy. I did double up the fabric but I am not sure if I needed to for it to work. I only did it for added durability. For me, it was worth the money I spent on it.

There is no direction, jus came in plain clear zip bag material and tape.

I have an EMF meter and this fabric does not block electrical or RF signals. I returned the product.

Did not block EMF at all. I sent it back.

Like any other form of shielding, nothing is 100% effective. The more you use, the more effective it is. How much shielding you need depends on how far you are from the signal source. Point blank, if you have a cell tower 100 feet from your house and you get 5 bars on your phone, 1 layer of this probably won't "black out" your phone. If you're 5 miles from a cell tower and 2 bars is what you normally get, 1 layer might be enough. So if 1 layer blocks 75%, 2 layers will block 75% and then 75% of what comes through layer 1, or around 93%, and so on and so forth. It would be nice if this were magic and could block 100% of incoming RF with a single layer. But unfortunately, you're not going to block 100% of incoming RF or EMF with a single, thin layer of whatever. The reality is, the physics just don't work that way. So how many layers of this stuff you'll need to do the job will depend on many variables that you'll honestly have to work out with a little experimentation.So the reviewers that say this doesn't block RF or EMF at all can't be right, because even plain paper blocks a LITTLE RF / EMF. Heck, AIR attenuates many frequencies. But what it does NOT do is block 100% of EMF or RF. For that you'll have to layer it. Understanding the physics of all this will go a long way to understanding how and why this works. In fact, if you could ground it you'd find its performance would get even better. But grounding isn't always an option.The tape it comes with is a bonus, and honestly it would probably work great if you wanted to protect, say, automotive electronic systems wiring from the effects of an EMP...just wrap all your wires with this tape to reduce the induced voltages of an EMP wave. Wish I had a mile long spool of the stuff, lol. Anyway, it works, just not 100%, but that's kind of expected. If you're interested in DIY EMF / RF shielding, this is a decent fabric to use, I suggest giving it a try. Just don't expect it to do what it physically can't do.