Shielding Faraday Fabric 44in W x 18ft L! EMI, RF&RFID Shielding Fabric, Military Grade Material Blocks Signals (WiFi, Cell)

This fabric works as intended. Highly recommend it.

Did not come with the tape that picture said it did.

Cannot wait to make some faraday phone bags

This "CME Faraday Cage Protection" fabric works well, and is exactly what I was looking for to protect my electronics. I covered my cell phone with one layer of this fabric and bundled it up underneath and the call signal from another cell, did not get through and the call went directly to voice mail. I highly recommend this product.Dwight

This is nice. I made some shielded boxes. They stop my phone from working.

I tested my phone and wrapped it all whole fabric for kicks. YouTube kept rolling on WiFi and cell connection. Crap Product Stay away.

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.

I really like this! Just wish there were different sizes & shapes to choose from!