Utility size ā the one that fits a working kit
The medium MAS utility bag measures 10.0 x 3.8 x 11.0 inches outside and 9.3 x 3.3 x 10.0 inside, with three RF-blocking layers. It is sized for the things that travel together: two or three phones, a tablet, key fobs, a GPS tracker recovered from a vehicle, or a small evidence bundle.
Isolation is the point. Anything inside cannot transmit, receive, be tracked or be wiped remotely.
Faraday Utility Bag (Medium) ā MAS Series ā 3 RF Layers
10.0 x 3.8 x 11.0ā³ (Outside), 9.3 x 3.3 x 10.0ā³ (Inside)
How to use it so it works
Shielding only works when the bag is closed correctly. Roll the closure the full number of turns the maker specifies and seal it; a single fold leaves a gap at the seam and the phone reconnects. Test it the first time: put the phone inside, seal it, call it from another line and confirm it does not ring, then check for missed-call notifications when you open it.
Two practical notes. A sealed phone burns battery hunting for signal, so charge before a long isolation. And shielding fabric wears at the fold line ā inspect it periodically and re-test rather than assuming a bag bought two years ago still performs.
Where we use them
Seizing a device for examination, transporting evidence, protecting a principalās phone during a sensitive meeting, and keeping key fobs out of range of relay theft. In forensic work the point is not privacy, it is integrity: an isolated phone cannot receive a remote wipe, and that is the difference between evidence and a story about evidence.
If the device in the bag matters to a case, hand it to an examiner sealed and untouched ā our examiners image devices with the chain of custody documented from the moment they arrive.
