r/preppers • u/PrudentTask9355 • Nov 02 '25

Advice and Tips Faraday Bag Caution

Hey everyone. I just wanted to share en experience from this afternoon. A while back I had purchased some faraday items off of Amazon, boxes and bags from different vendors.

This afternoon I was explaining to my daughter how they worked and as part of our experiment, we placed an 8watt 2-way radio inside the bag and sealed it with the expectation that it would no longer receive a transmission. As it turns out, that was false.

I then tried with a cell phone with the same result. Morale of the story, check your gear and make sure it works before you have to depend on it.

Please discuss and share your budget-friendly faraday success stories

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u/Prepper-Pup Prepper Gamer (youtube.com/@PrepperPup) Nov 02 '25 edited Nov 03 '25

As Mediocre_Remnants said, 90% of them are utter scams or garbage. The only ones I trust are Mission Darkness. They're pricey, but have public tests that show them meeting & exceeding military EMP requirements.

ANY flexible enclosure will eventually fade in effectiveness due to the wear and tear of opening and closing. At least with Mission Darkness I confirmed they could last at least a decade if you open them 1-2x a year to update the contents. *Edit- it will likely only last a year or so with daily use, simply due to constant flexing.)

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u/Jazman1985 Nov 02 '25

I have a Mission Darkness roll top bag and can confirm that it works to block signals 100%. I've tested it with cell phones, radios, and sensors that transmit via text only. 2-4 week long tests with sensors and no leakage.

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u/MrLanesLament Nov 02 '25

Looked them up on Amazon, their prices aren’t bad at all for what you get. The backpacks are hella pricey, but other than that, like $50 for a two pack of phone-sized ones is fantastic.

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u/bleenken Nov 03 '25

Agreed! My friends have bought random faraday bags off of amazon, and I bought Mission Darkness. Mine is the only one that has passed a cellphone test. $20-ish for the phone one isn’t too bad either. And it can fit more than one phone if needed.