I bought the Zero Grid 3-pack faraday bags for one reason: I wanted the option to go dark. Not every day — most days they sit in a drawer. But when I need my phone or keys to be unreachable, these are the go-to.
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Quick verdict
A faraday bag is a pouch lined with signal-blocking material that cuts your devices off from the outside world — no WiFi, Bluetooth, cell signal, GPS, or RFID. The Zero Grid 3-pack covers the three sizes you actually need: one for a phone, one for a laptop or tablet, and a small one for keys, cards, and fobs. If you want the ability to put your electronics in timeout — for security, for travel, or just to stop the notifications — this is a solid, well-built set. check current price on Amazon
Why I bought it
I picked these up because I wanted a real security option, not a gimmick. Relay attacks on car key fobs are a known thing — someone stands near your door with a device that grabs your fob’s signal and opens your car. A faraday bag kills that dead. I also liked the idea of being able to fully disconnect: drop the phone in, and it’s off the grid until I take it out.
Honestly, right now I use them for nothing. They sit in the drawer. But that’s the point of owning them — the capability is there the moment I want it.
What it’s like to use
The set comes with three bags: large, medium, and small. The large one swallows a laptop or tablet. The medium fits a phone comfortably. The small one is perfect for a key fob, bank cards, or a passport. Each bag has a roll-down top with a flap closure, a carabiner clip for clipping onto a bag or belt loop, and a wide carrying handle.
The material is a multi-layer shielding fabric that blocks WiFi, Bluetooth, cell signals, GPS, RFID, and radio signals. The listing also claims fireproof and waterproof protection, and the bags feel heavier and more substantial than the cheap single-layer sleeves you see everywhere. The build quality is good — the closures are secure, and the whole thing folds flat when empty.
The one thing to know: a faraday bag only works when it’s fully closed. You can’t just toss your phone in and leave the flap open — the seal is what blocks the signal. It takes two seconds, but it’s a habit.
Key specs
| Spec | Detail |
|---|---|
| Set contents | 3 bags — large, medium, small |
| Blocks | WiFi, Bluetooth, cell, GPS, RFID, radio signals |
| Material | Multi-layer faraday shielding fabric |
| Closure | Roll-down flap with snap |
| Extras | Carabiner clip, carrying handle, leather stow-away pocket |
| Bonuses | Trip Assurance theft reimbursement, ReturnMe lost-and-found tags |
| Weight | 0.57 kg (set) |
Who should skip it
If you want a bag you’ll use every single day, this isn’t that — it’s a security tool, not an everyday carry item. And if you’re only worried about one thing, like a single car fob, a smaller single-purpose pouch costs less than this three-pack. Buy it if you want the full set of sizes and the option to go dark whenever you choose.
FAQ
Do faraday bags really block car key fob signals?
Yes, when the bag is fully closed. The shielding material blocks the radio frequencies that key fobs use, which stops relay attacks where someone amplifies your fob’s signal from outside your house. That’s the main reason people buy them for car keys.
Can I use a faraday bag to stop phone tracking?
Yes. A closed faraday bag blocks cell, WiFi, and GPS signals, so your phone can’t be pinged, located, or tracked while it’s inside. It’s the same principle used to shield devices from remote access — put it in, seal it, and it’s unreachable.
What’s the difference between faraday bags and RFID wallets?
RFID wallets only block the short-range frequencies used by payment cards and passports. Faraday bags block a much wider range — WiFi, Bluetooth, cell, GPS, and radio signals — which is why they work for phones, laptops, and key fobs, not just cards.
Bottom line
The Zero Grid 3-pack is the set I reach for when I want my devices to disappear. I don’t use it daily, but knowing I can put my phone or keys in timeout — for security or just for peace of mind — is worth having. If you want the option to go dark, this is the go-to. check current price on Amazon