The GoDark® Faraday Dry Bag (5L) combines proven Faraday shielding technology with rugged, waterproof construction to deliver reliable signal isolation in demanding environments. Designed to block cellular, Wi-Fi, Bluetooth, GPS, and RFID signals, it prevents remote access, tracking, and unauthorized data transmission from devices stored inside — without sacrificing durability or portability. The dry bag form factor adds an extra layer of protection against moisture, making it well suited for field operations, travel, and outdoor use.
Trusted by law enforcement, security professionals, and privacy-conscious individuals, it provides a practical solution for evidence preservation, device quarantine, and personal data security on the go.
- Blocks cellular, GPS, Wi-Fi, Bluetooth, and RFID signals for complete wireless isolation
- Waterproof dry bag construction protects devices in harsh or unpredictable conditions
- 5L capacity accommodates smartphones, tablets, key fobs, and other electronics
- Ideal for evidence integrity, anti-tracking, and secure device transport
Two protections in one enclosure
A shielded dry bag solves a problem that comes up more often than it sounds: environments where a device needs to be protected from both networks and water. Field investigation in weather, marine and waterfront work, river and lake operations, boating, desert monsoon season, search and recovery, and any transport where a device may be exposed to rain, spray or submersion.
Sealed inside, the device is beyond the reach of cellular, Wi-Fi, Bluetooth and satellite positioning — and beyond the reach of water. Both are properties of the enclosure rather than settings on the device, which is what makes them dependable.
Why the combination matters in the field
Evidence handling outdoors is the clearest case. A phone recovered from a vehicle, a boat, a shoreline or a scene in the rain needs to be isolated from networks immediately so it cannot be wiped remotely or altered by synced deletions, and it needs to be protected from further water damage while it is transported. Doing both with two separate bags means either the shield or the seal is compromised; doing both in one enclosure means neither is.
The same logic applies to working devices. A protective detail or an investigator operating in weather still needs the option of going dark, and a standard Faraday bag is not built to keep water out.
Sealing it correctly — both seals matter
A roll-top dry closure and a Faraday closure have similar mechanics and different tolerances. Roll the specified number of turns, press firmly along the full width, and secure the closure. Check both corners; a lifted corner is a gap for radio and a path for water, and one closure failure defeats both purposes at once.
Before relying on it in the field, test both functions separately. For shielding, seal a phone inside and call it from another device — it should go directly to voicemail with no ring. For the water seal, close the empty bag with air trapped inside, submerge it, and watch for bubbles. Do both again periodically, and always before a trip where failure would be expensive.
Field practice
- Trap a little air when closing for water protection. It helps the bag float and makes a slow leak visible as the bag gradually loses buoyancy.
- Keep sharp objects out. A puncture defeats both the shield and the seal, and it will not always be visible.
- Rinse and dry after salt or muddy water. Salt is corrosive to the closure hardware and abrasive grit works into the seal surfaces, which is where both functions degrade first.
- Dry it fully before storage and store it loosely rather than folded flat under weight.
- Expect faster battery drain inside the shield, since a device searching for an unavailable network transmits harder.
- Plan where you open it. A device that has been dark reports its position immediately on reconnecting.
Arizona-specific notes
Water protection reads as an odd requirement in a desert state until monsoon season, when a field day turns into standing water and driving rain within twenty minutes and the washes fill fast. Anyone doing field work here between July and September has a use for a dry enclosure, and the same bag covers lake and river work at Roosevelt, Pleasant, Havasu and the Colorado.
Heat is the other local factor. Do not leave the bag in a vehicle through the summer if you can avoid it — sustained high temperature is hard on both the conductive layer and the sealing surfaces, and both degrade silently.
If the device is evidence
The bag is one step in a process that has to hold together. Record who recovered the device, when, from where, and everyone who has held it since. Do not browse it to check something — every interaction changes state and gives an opposing party an argument. Do not power it on or off outside a controlled process, because both can trigger encryption behaviour, scheduled tasks and logging that complicate a clean acquisition. If a device has been in water, do not attempt to power or dry it with heat; that decision belongs to the examiner.
Seal it, document it, and pass it to someone who does acquisitions properly — our digital forensics team handles imaging, analysis and reporting to a standard that survives scrutiny.
What it does not do
It blocks signals and water while sealed and does nothing at any other time. It does not remove malware, repair a compromise, or protect an account reachable by anyone holding the password, and it is not a substitute for a strong passcode and device encryption if the device is taken rather than tracked.
Check the internal dimensions above against the devices you intend to carry, with cases on, and leave room to make the closure properly — a bag filled to its limit is a bag that seals badly.
