Faraday Pouch for Car Keys, Signal Blocking RFID Faraday Bag Cage, Anti-Theft Key Fob Pouch Protector (Small)

I got my first modern car with push to start after my 2013 Sonata was stolen from my driveway. Call my a bit paranoid but thieves are getting more sophisticated and signal amplification attacks are becoming more common. I have this bag hanging by my door and I just toss my keys in and close the pouch every day. I tried taking my keys in the bag to my car and the proximity unlock did not work nor would the car start so I know the bag functions as advertised.

Nice

The good news is that the RF blocking works very well, preventing my fob signal from reaching my car even when I was sitting inside my car. The bad news is that the signal blocking liner is only installed on the rear of the pouch and is very thin so it's durability is in doubt with regular use.When I first received this, I thought the stitching on the back liner had ripped out. But when checking out the "damage" it was apparent that this was an intended opening to the shield lining. And it looked like the shield lining did not extend to the front of the pouch. This was confirmed in testing. Put the fob in the lower slot between the front and back of the stronger outer pouch and there is no signal blocking. Put the fob in the higher slit of the lining, on the back piece only, and you get great blocking. This is a very confusing design decision. And in actual use this way, the thin blocking layer will likely get quickly damaged by the keys on the fob. It might be less susceptible when used with a phone, but the weird construction would be hard to use in that layout also since the "natural" opening at the fold provides no signal blocking. The "hidden" slit on the back is the one than needs to be used.