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A Faraday bag is a pouch or bag lined with layers of conductive, metalized fabric. The lining spreads incoming radio signals around the outside of the bag, so signals can't get in or out. Close the bag fully, because a gap lets signal through.

How Faraday bags work →

Cellular (4G LTE and the 5G bands most phones use), GPS, Wi-Fi, Bluetooth, RFID and NFC. While a device is sealed inside, it can't send or receive those signals, so it can't be tracked, reached remotely or skimmed.

EMF frequency guide →

Most 5G phones connect on bands below 6 GHz, the same range as 4G LTE, and our shielding is designed for signals up to 10 GHz. High-band mmWave 5G (24 GHz and up) is only used in parts of some U.S. cities and is outside that design range.

EMF frequency guide →

Seal your phone inside, close the bag fully and call it from another phone. If the call goes straight to voicemail, the bag is working. You can also check that Wi-Fi and Bluetooth drop the connection.

See our test results →

Yes. In a relay attack, thieves pick up your key fob signal from inside your home and pass it to your car so it unlocks and starts. A fob sealed in a Faraday pouch can't be reached, so there is nothing to relay.

Keyless car theft explained →

While your phone is sealed, it can't connect to cell towers, GPS, Wi-Fi or Bluetooth, so it can't report its location. Once you take it out, it reconnects and apps can share your location again.

Faraday bag vs phone case →

Contactless cards and passports can be read at close range, usually within a few centimeters. Real-world skimming is uncommon, but an RFID-blocking pocket stops the read completely while the card is inside.

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A sealed Faraday bag adds a layer of shielding that can reduce the energy reaching a device, which is why many people store backup electronics in one. No consumer bag carries an official EMP rating, and we don't claim one.

Faraday bag types and features →

A spare phone, radios, a backup hard drive, car key fobs and any other electronics you want kept offline and ready to use.

3 reasons you need a Faraday bag →

Only partly. Foil tears easily, has no proper seal and gives inconsistent results, so it works as an experiment but not as everyday protection.

NIJ Level IIIA is the National Institute of Justice rating for soft body armor tested against handgun rounds. The Shield backpack's removable Kevlar insert is built to that standard and was independently tested against 9mm at Element U.S. Space & Defense: six shots, zero penetrations. Level IIIA is not rated for rifle rounds.

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In most of the U.S., adults can buy and carry a bullet-resistant backpack. A few states limit how body armor is sold, for example New York and Connecticut, and federal law bars people convicted of a violent felony from owning body armor. Check your state rules before you buy.

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Yes. Faraday bags are legal to own and use in the U.S. Law enforcement, the military and digital forensics teams use them every day.

A Faraday backpack gives you shielded pockets for your phone, key fob and cards plus room for a laptop and daily gear. Our ballistic models add a removable NIJ IIIA insert in the same bag.

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Silver-fiber fabric reduces radio signals that pass through it. Unlike a sealed Faraday bag, it only covers the area of the garment, so it lowers exposure instead of blocking signals completely.

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30-day returns on every order (10% restocking fee, return shipping paid by the customer), a 2-year warranty on gear (apparel excluded) and free shipping to the contiguous U.S. on orders over $149.

Warranty details →