Quick Answer: The Mission Darkness Non-Window Faraday Bag blocks all signals reliably and fits two key fobs. For single-key protection, the Ticonn Extra-Thick Faraday Pouch costs less and works just as well. Both passed our walk-up test with push-button start vehicles.
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Relay theft takes 60 seconds. Thieves amplify your key fob signal from inside your house. Your car thinks the key is nearby. They drive off.
This attack works on most cars with keyless entry built after 2018. The National Insurance Crime Bureau reported relay theft accounts for substantial vehicle theft claims. Your insurance deductible does not care about the technology.
A working Faraday bag blocks the signal. Your key fob cannot transmit. The relay attack fails. We tested these bags with the How to Test a Faraday Bag: The Simple Walk-Up Test (2026)/” title=”How to Test a Faraday Bag: The Simple Walk-Up Test (2026)”>How to Test a Faraday Bag: The Simple Walk-Up Test (2026) on three different vehicles with push-button start systems.
Mission Darkness Non-Window Faraday Bag: Best Overall
This bag uses two layers of TitanRF Faraday fabric. The outer layer blocks signals from 600 MHz to 6 GHz. The inner layer adds redundancy. We tested it with a 2024 Toyota RAV4 key fob. The car would not unlock when the fob sat inside the bag 10 feet from the vehicle.
The bag measures 8 by 11 inches. It holds two key fobs, a smartphone, and a credit card wallet. The dual-zipper closure creates overlapping shielded seams. No signal leaks through the opening.
The construction feels solid. Double-stitched seams. Reinforced corners. The fabric does not tear when you pull hard on it. Mission Darkness makes this bag in the USA with military-grade materials.
This bag costs more than basic pouches. You pay for verified shielding and durability. If you own a vehicle worth more than $30,000, this bag makes sense. The insurance deductible alone justifies the cost.
Mission Darkness Non-Window Faraday Bag
Ticonn Extra-Thick Faraday Pouch: Best Budget Option
The Ticonn pouch blocks signals for half the price. It uses military-grade faraday fabric with nickel and copper shielding. We tested it with a 2023 Honda Accord key fob. The car did not respond when the fob sat in the pouch.
This pouch measures 6.7 by 3.7 inches. It fits one key fob comfortably. Two fobs squeeze in but the pouch bulges. The velcro closure seals tight. The overlap creates proper shielding at the opening.
The fabric feels thinner than Mission Darkness. It works but shows wear faster. After six months of daily use, the corners frayed slightly. The shielding still tested effective.
Buy this if you need basic signal blocking for one key. Skip it if you carry multiple fobs or want a bag that lasts five years. The price point works for most car owners who just want relay attack protection.
Ticonn Extra-Thick Faraday Pouch
EDEC Faraday Bag for Key Fob: Best for Multiple Keys
The EDEC bag solves the multiple-key problem. It measures 7.5 by 4.5 inches with an internal divider. You can separate work and personal keys. Each compartment shields independently.
The bag uses dual-layer construction. Outer layer blocks RFID, WiFi, Bluetooth, and cellular signals. Inner layer adds backup shielding. We tested it with three different key fobs simultaneously. None transmitted signals while stored inside.
The zipper closure runs the full length of the bag. The overlapping fabric creates a proper seal. No gaps. The stitching quality matches Mission Darkness. This bag should last years with normal use.
The divider makes this bag useful beyond key fobs. Store credit cards on one side. Put your key fob on the other. Everything stays organized and shielded. This matters when you travel frequently and need Executive Travel Security: Why Faraday Bags Are Mandatory for Protecting Corporate Assets (2026).
Other Options Worth Considering
The Silent Pocket Faraday Key Fob Guard uses the same TitanRF fabric as Mission Darkness. It costs slightly more but adds a water-resistant outer shell. Buy this if you live in a wet climate or keep your keys near water. The shielding performance matches our top pick.
The Defender Signal Blocker Box takes a different approach. It uses a hard case instead of fabric. The rigid construction protects keys from physical damage. The metal shell blocks signals effectively. We verified this with our walk-up test. The box works but takes more space in a bag or pocket. Choose this if you need impact protection along with signal blocking.
Quick Comparison
Mission Darkness costs the most but lasts longest. Verified military-grade construction. Holds two fobs plus extras. Best for high-value vehicles or daily use.
Ticonn delivers solid protection at half the price. Single fob capacity. Good for basic relay attack prevention. Shows wear faster than premium options.
EDEC splits the difference. Multiple fobs. Internal organization. Durable construction. Best for people who carry work and personal keys.
Final Verdict by Use Case
Buy Mission Darkness if your car cost more than $40,000 or you want a bag that lasts five years. Get Ticonn if you own one vehicle and want basic protection now. Choose EDEC if you carry multiple key fobs daily and need organization. All three passed our signal blocking tests. The difference comes down to capacity and build quality.
Frequently Asked Questions
Do Faraday bags actually stop relay attacks?
Yes, when properly constructed. A working Faraday bag blocks the radio signal your key fob transmits. Thieves cannot amplify a signal that does not exist. We verified this with the How to Test a Faraday Bag: The Simple Walk-Up Test (2026) on multiple vehicles. The key fob must stay completely inside the bag with the closure sealed.
Can I just wrap my key fob in aluminum foil?
Aluminum foil blocks some signals but not reliably. Small gaps or tears let signals through. The foil tears easily in pockets or bags. A proper Faraday bag costs less than your insurance deductible. Foil works for testing signal blocking. It does not work for daily protection.
How do I know if my car is vulnerable to relay theft?
If your car has keyless entry or push-button start, it likely uses a signal that can be amplified. Most vehicles built after 2018 with these features are vulnerable. Test your key fob: put it in a Faraday bag and walk up to your car. If the car does not unlock, the bag works and your car was vulnerable.
Will a Faraday bag damage my key fob battery?
No. The bag only blocks signals. It does not affect the battery. Your key fob battery drains faster when constantly transmitting. Storing it in a Faraday bag may actually extend battery life by preventing unnecessary signal transmission.
Do I need a Faraday bag if I park in a garage?
Yes, if thieves can get within 30 feet of where you store your keys. Relay attacks work through walls. Thieves stand outside your house with an amplifier. They boost the signal from your key fob inside. Distance matters more than walls. If your keys sit near an exterior wall or window, use a Faraday bag.
Tye is a CISSP-certified cybersecurity analyst with over 25 years in IT and 15 years specializing in network defense and threat intelligence. He built PacketMoat to bring enterprise-grade security knowledge to everyday people and small businesses.