The 8 Best Faraday Bags For Phones
Updated by · How we research
Eight Faraday bags and sleeves for phones compared on seal, shielding and fit. The Mission Darkness Non-Window leads for its double-roll seal and modest price. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki.
A Faraday bag only works when it's sealed: a federal forensics guide warns that seams, thin fabric and a loose closure let signals slip through, and that a phone hunting for a tower drains its battery fast. Call your phone once it's sealed to check. These picks suit privacy-minded travelers, drivers guarding key fobs and anyone who wants a phone offline.
Editor's Notes
October 23, 2026, by Ezvid Wiki Admin:
The Mission Darkness Non-Window now leads this list. Its double-roll seal stopped live calls in independent checks, it's assembled in the U.S., and it costs little for a bag from a maker that names its test standards. The Mission Darkness Dry Shield, Mission Darkness Mojave, SLNT Locking Sleeve and DefenderShield ConcealShield stay. The Faraday Defense Jacket Pro, Mission Darkness NeoLok and Simket Two-Pack are new.
We dropped the EDEC OffGrid window bag, the Onever Pouch, the NeoLok with Battery and the Silent Pocket Carryall because they've gone off the market, and the Armadillo Pro-Tec because we found nothing beyond its sales page to back it.
The most useful evidence here came from two prepper sites that sealed phones in these bags and then tried to call, pair or connect to them, and from NIST's guide to handling seized phones, which explains why bags leak and drain batteries. We read each maker's shielding claims and checked every brand for recalls. None turned up.
December 12, 2020:
Anyone who has even a passing knowledge of Faraday bags shouldn't be too surprised to see that multiple models from Mission Darkness have made the cut; this company produces reliable gear for protecting your critical devices, from smartphones to laptops. Because it offers shielding as well as protection against water, we've added the Mission Darkness Dry Shield Sleeve as the choice to beat at this time. It's easier to close securely than many, and the price isn't too steep. The Armadillo Pro-Tec remains on the list as a similar alternative, although one that's less expensive — and perhaps not made to quality standards that are quite as high.
Both of the aforementioned are relatively small and slim. For something larger, look to the Mission Darkness Non-Window, Mission Darkness Mojave, or DefenderShield Anti-Tracking. The DefenderShield model even has a handy crossbody strap, making this a good choice for travel. The Silent Pocket Carryall also has a carrying strap, one designed for the wrist, that makes this model look quite a bit like a wristlet purse.
Finally, a quick word about using a Faraday phone bag properly. In order for these pouches to work, they need to be sealed securely according to all manufacturer specifications. For instance, some, like the Onever Pouch, have a liner inside, and the phone must be placed fully within this liner in order for the pouch to function. Sometimes this placement is not intuitive, so you'll want to carefully read the item's directions. You should also occasionally inspect whichever one you choose, since rips, loose stitching, and other issues caused by daily use can render the bag ineffective.
February 05, 2019:
These models were all selected since they’re well equipped to keep your phone insulated and safe from the wealth of personal and financial information that it may store. Included are 2 Mission Darkness models, both known for their dependability, as well as 2 practical choices equipped with straps. In all, the selections featured here are in a variety of shapes and at different price points. Interestingly, this type of product got its name from 19th century scientist Michael Faraday, who invented a conductive mesh enclosure to block electrical fields.
Special Honors
GoDark Faraday Bag for Phones GoDark sells only through its own site, so it isn't on our list, but it's a long-running maker worth knowing. Its phone bag uses a roll-top closure, welded water-resistant seams and a foam layer, and GoDark says its fabric beat 100 decibels in independent lab tests and passed a military EMP shielding test. godarkbags.com
How A Phone Bag Leaks, And How To Check Yours
A Faraday bag is a pouch lined with metal-plated fabric that stops radio waves from reaching the phone inside: cellular, Wi-Fi, Bluetooth, GPS and NFC.
A Faraday bag is a pouch lined with metal-plated fabric that stops radio waves from reaching the phone inside: cellular, Wi-Fi, Bluetooth, GPS and NFC. It isn't all or nothing. The NIST guide to mobile device forensics says shielding containers may weaken a signal without fully stopping it, especially near a cell tower. It cites a Purdue field test in which many shielding products let some traffic through, text messages most often, for three reasons: thin material, gaps at the seams and the shield itself acting as an antenna.
Most real-world failures come down to the closure. A roll-top that isn't rolled all the way, or a flap left half open, leaks. Check yours the way reviewers at TruePrepper and Cat Outdoors did: seal the phone, then call it from another phone, try to pair a Bluetooth speaker and look for it on Wi-Fi. If anything connects, reseal it and try again before trusting the bag.
A powered-on phone that can't find a network keeps raising its radio power to search, so the battery drains faster than usual (NIST). For storage or long trips, power it off first.
Roll-Top, Magnetic Flap Or Travel Case
Closures trade speed for seal. Roll-top envelopes, like the Mission Darkness Non-Window, fold the opening over twice and then fasten it, which closes the gap that leaks most. They're slower to open. Magnetic double rolls, used on the Dry Shield, close faster and still roll. A single magnetic flap is quickest of all, but it depends on the flap lying flat every time.
Check the inside size against your phone in its case, not the bare phone. Interior sizes run from about 6.65 by 4.5 inches on the SLNT medium sleeve, which doesn't take thick rugged cases, to about 6.5 by 9 inches on the NeoLok. The Mojave hides a shielded sleeve of about 4.5 by 7 inches inside a zippered organizer, and only that sleeve blocks signals.
Carry style matters too. Slim sleeves fit a jacket pocket, roll-top envelopes ride in a bag, and crossbody pouches stay on your body. Police officers use heavier bags for evidence, since a seized phone can be wiped or tracked remotely (Police1).
What Shielding Claims Mean, And What They Don't
"Military grade" on a box means nothing by itself. MIL-STD-188-125 and IEEE 299 are test methods, and makers usually test the fabric, not the finished bag. Mission Darkness says its fabric was tested to both and offers figures on request. SLNT publishes lab results for one layer of its fabric, about 80 to 95 decibels across 1 to 40 GHz (SLNT). Budget brands often name no test at all, which is why a call test at home matters.
A plain RFID-blocking wallet or card sleeve is not the same thing. It stops short-range card readers, not a phone's cellular radio. Airplane mode isn't a substitute either: it can be faked by malicious apps and doesn't always shut off location (NIST, Police1).
Care keeps the shielding working. Avoid sharp creases in the same spot, keep the lining dry, and replace a bag with a puncture or a torn seam (Mission Darkness). Owning a Faraday bag is legal in the U.S., but a sealed phone can't call 911, so don't bag the only phone you'd use in an emergency.
How we researched this
We compared 15 phone bags and sleeves, read the maker pages and shielding claims for the 8 finalists, used independent phone-signal checks from TruePrepper and Cat Outdoors, read NIST's guidance on how shielding containers fail, analyzed owner feedback patterns, and checked every brand against U.S. Consumer Product Safety Commission recalls. Updated October 23, 2026 by Ezvid Wiki Admin.
Sources (12)
- Mission Darkness: Non-Window Faraday Bag for Phones
- Mission Darkness: NeoLok Non-Window Faraday Bag
- Mission Darkness: Dry Shield Faraday Phone Sleeve
- Mission Darkness: Mojave Faraday Phone Bag
- SLNT: Faraday Sleeves for Phones
- DefenderShield: Ultra Armor
- GoDark: Faraday Bags for Phones
- TruePrepper: Best Faraday Bags
- Cat Outdoors: Best Faraday Bags
- Police1: Why every police officer needs a Faraday bag
- NIST SP 800-101 Rev. 1: Guidelines on Mobile Device Forensics
- U.S. Consumer Product Safety Commission recalls
Frequently asked questions
Do Faraday bags actually work for phones?
Good ones do when they're sealed properly. Independent checks found well-made bags cut off calls, Wi-Fi and Bluetooth. NIST warns that any container may only weaken a signal, so test yours by calling the phone once it's sealed.
Can a phone be tracked inside a Faraday bag?
Not while the bag is fully sealed and working, because the phone can't reach towers, Wi-Fi or GPS. Once you open it, the phone reconnects and can report its location again.
Does a Faraday bag drain the phone's battery?
It can. A phone that can't find a network keeps searching at higher power, so the battery runs down faster. Turn the phone off if it will stay in the bag for long.
Is a Faraday bag the same as airplane mode?
No. Airplane mode is a software switch that can be faked by a malicious app and may leave location on. A sealed bag blocks the signals physically.
Will a Faraday bag fit my phone in its case?
Check the inside size, not the outside. Roll-top envelopes and the larger magnetic bags take big phones in rugged cases, while slim sleeves often need a thin case.
Are Faraday bags legal?
Yes, they're legal to own and use in the U.S. Using one to hide evidence from an investigation is a crime, and a sealed phone can't call 911.
