GoDark® Faraday MAS Utility Bag – Large

The large utility bag is the MAS-series size for a full device set rather than a single handset — 10.0 × 8.25 × 11.0 inches outside, 9.3 × 7.3 × 10.0 inches inside, three RF shielding layers. It holds a tablet, a laptop sleeve, several phones, a radio and a camera body, or an entire bagged evidence set from one scene.

Faraday Utility Bag (Large) – MAS Series – 3 RF Layers

10.0 x 8.25 x 11.0″ (Outside), 9.3 x 7.3 x 10.0″ (Inside)

What a Faraday bag does, precisely

A Faraday bag is a conductive enclosure. Radio energy cannot cross it in either direction, so a device inside cannot receive a signal, cannot transmit one, and cannot be located, wiped or updated remotely. Cellular, Wi-Fi, Bluetooth, GPS and RFID are all covered at once. It is not a jammer and not a software setting — it is physics, and it works on a device you do not control and cannot unlock.

Three RF layers rather than one is the difference between a bag still working after a year of daily use and a pouch that merely attenuates. Shielding degrades as material is flexed, abraded and opened thousands of times; the layer count is the margin that absorbs that wear.

Why the large size specifically

Two reasons people size up. The obvious one is a laptop or tablet, which no phone sleeve takes. The less obvious one is multiple devices at once: on a scene, phones, tablets, drives, fobs and trackers all need isolating simultaneously, and the alternative to one large bag is a fistful of small ones and a much better chance of one being sealed wrong.

Do not overfill it. A bag stuffed until the closure cannot fold and secure properly is not shielding — a partly closed Faraday bag is an antenna with a slot in it. Leave enough room for the closure to fold exactly as designed.

Real uses

Evidence handling. A seized device left connected can be wiped remotely, can receive traffic that alters its state, and can sync changes that complicate authentication later. Bag it at the point of seizure, powered on. Do not shut it down — powering a modern phone off triggers full-disk encryption that can leave it unreadable. Bag it, keep it powered, get it to an examiner. See digital forensics.

Executive and travel privacy. Devices in the bag during a sensitive discussion cannot act as microphones or location beacons, whatever is installed on them.

Key fobs. Relay attacks extend a fob’s signal from inside your house to a thief at your car; a bagged fob ends that attack outright.

Found trackers. A GPS tracker recovered from a vehicle stops reporting the moment it is bagged, preserving it intact rather than alerting whoever placed it.

Using it correctly

Fold and secure the closure the same way every time. Test before you rely on it — put a phone inside, close it properly, call the phone; if it rings, the seal is wrong. Retest periodically. And plan for battery drain: a device that cannot find a network climbs to full transmit power hunting for one, so it comes out considerably flatter than it went in.

Related

See the full Faraday bag range for other sizes, or talk to us if this is for evidence handling and you want the procedure right as well as the bag.