EMF protection
Laptop Faraday Bag | MacBook & Laptop Signal Blocking | Triple-Layer | Made in the UK
Laptop Faraday Bag | MacBook & Laptop Signal Blocking | Triple-Layer | Made in the UK
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Your Laptop Holds Everything. The Faraday Bag Keeps It Isolated When You Need It To Be.
Of all the devices we carry, a laptop holds the most - work credentials, business communications, client data, financial records, intellectual property and personal accounts. It is also the device most likely to be targeted: at borders, in hotel rooms, at conferences, or anywhere that sensitive business information is at risk of wireless interception or data extraction.
The Leblok Security Laptop Faraday Bag acts as a Faraday cage for your laptop, physically isolating it from Wi-Fi, Bluetooth, mobile networks, GPS and RFID signals. When you need your device to be genuinely off the grid - not just in flight mode, which can still be overridden or misconfigured - a Faraday bag provides a physical signal barrier that software settings cannot replicate.
Unlike an ordinary laptop sleeve or carry case, which protect against physical damage but do nothing to prevent wireless communication, a Faraday bag blocks external wireless signals entirely while the bag remains correctly sealed.
Built upon Leblok's long-standing expertise in RF shielding, the Leblok Security Laptop Faraday Bag incorporates three layers of independently tested high-performance RF shielding material - the same triple-layer construction used across the Leblok Security range, scaled up to accommodate professional laptop computers. Manufactured in the UK and individually inspected before leaving our factory, it is built for the demands of regular professional use.
Designed for Laptops and Larger Portable Devices
The Laptop Faraday Bag has been developed to accommodate most laptop computers - including MacBooks, ultrabooks and notebooks - while providing the same dependable signal isolation found throughout the Leblok Security Faraday range.
External Dimensions (Closed): 480 × 370 mm
Suitable for:
- Most laptop computers
- MacBooks, ultrabooks and notebooks
- Tablet computers
- Portable electronic devices
- Multiple mobile phones
- Radio equipment
Looking for a smaller Faraday bag? We also offer Faraday Phone Bags and a dedicated Tablet Faraday Bag for smaller devices.
What Can a Laptop Faraday Bag Be Used For?
A laptop Faraday bag offers a practical way to physically isolate your device from external wireless signals in situations where signal isolation matters - whether for professional security, personal privacy or protection against electromagnetic events.
The Leblok Security Laptop Faraday Bag can help you:
- Isolate your laptop from Wi-Fi, Bluetooth, mobile networks and GPS.
- Help safeguard sensitive information stored on your device.
- Help prevent location tracking while your laptop remains inside the bag.
- Prevent wireless communication during border crossings, secure meetings or transit through high-risk environments.
- Help reduce unnecessary RF exposure by preventing your device from communicating with external wireless networks while it is not in use.
- Shield compatible RFID-enabled devices from unwanted communication.
- Provide an additional layer of protection against electromagnetic pulse (EMP) events and TEMPEST surveillance methods.
Simply place your device inside the bag, fold the opening twice and fasten the security strap. Your laptop remains physically isolated until you choose to remove it.
Why Choose Leblok Security?
Shielding is at the core of what Leblok does.
Long before introducing the Leblok Security range, Leblok established itself as a specialist manufacturer of EMF shielding clothing and protective products trusted by customers around the world. The same understanding of RF shielding materials, construction techniques and quality control has been carried directly into every Faraday bag we produce.
Rather than relying on a single shielding layer, the Leblok Security Laptop Faraday Bag incorporates three layers of independently tested high-performance RF shielding material, carefully bonded together and reinforced with durable stitching to provide reliable shielding performance and long-term durability.
Every Leblok Security Laptop Faraday Bag is manufactured in the UK and individually inspected before leaving our factory, because dependable signal isolation relies not only on the shielding material but also on the quality of the finished construction.
Why Three Layers Matter - Even More So at Laptop Scale
At laptop scale, the demands on a Faraday bag are greater than for any smaller device.
The shielding surface area is larger, the closure is longer and has more material to seal, and the bag will typically be used in more demanding professional environments where reliable performance is not optional. A single layer of shielding material that performs adequately in a small format may not deliver consistent results when those same demands are scaled up to a bag designed for a 15" or 16" laptop.
The Leblok Security Laptop Faraday Bag uses three independently tested layers of high-performance RF shielding fabric throughout its construction - not just in one panel - paired with a dual-fold closure designed to minimise signal leakage at the opening. The result is a laptop Faraday cage bag built to perform reliably with regular professional use, not just under ideal conditions.
Built for Everyday Reliability
The effectiveness of a Faraday bag depends on much more than simply using conductive fabric - and the stakes are higher when the device you are protecting holds sensitive professional information.
Every Leblok Security Laptop Faraday Bag combines carefully selected materials with precise manufacturing techniques to produce reliable, long-lasting shielding performance.
Features include:
- Triple-layer RF shielding construction
- Waterproof outer fabric
- High-strength bonded construction
- Reinforced stitching throughout
- Secure hook-and-loop fastening
- Dual-fold closure designed to minimise signal leakage
- Durable construction for repeated daily use
Independently Tested Shielding Material
Confidence in shielding performance should be based on independent testing rather than assumptions.
The RF shielding material used in the Leblok Security Laptop Faraday Bag has been independently tested by the University of the Armed Forces (RF, Microwaves and RADAR Department), Germany, in accordance with internationally recognised standards ASTM D-4935-10 and IEEE 299-2006.
The test results below represent the shielding performance of one layer of the material. The product is constructed with three layers of this shielding material.
| Frequency | Shielding | Standard |
|---|---|---|
| RFID 13.56 MHz | 80 dB | ASTM D-4935-10 |
| C-Net, TETRA, 450 MHz | 80 dB | ASTM D-4935-10 |
| D-Net, GSM900, 900 MHz | 83 dB | ASTM D-4935-10 |
| E-Net, GSM1800, 1800 MHz | 85 dB | ASTM D-4935-10 |
| Bluetooth, WLAN 2450 MHz | 84 dB | ASTM D-4935-10 |
| 5G (Sub 6GHz Band) 3.4–3.8 GHz | 85 dB | ASTM D-4935-10 |
| W-LAN New Generation 5.8 GHz | 75 dB | ASTM D-4935-10 |
| 7.5 GHz | >42 dB | IEEE 299-2006 |
| 10.0 GHz | >42 dB | IEEE 299-2006 |
| 12.5 GHz | >42 dB | IEEE 299-2006 |
| 15.0 GHz | >42 dB | IEEE 299-2006 |
| 18.0 GHz | >42 dB | IEEE 299-2006 |
| 30 GHz | >52 dB | IEEE 299-2006 |
| 35 GHz | >52 dB | IEEE 299-2006 |
| 40 GHz | >52 dB | IEEE 299-2006 |
Protection Against Common Wireless Technologies
The Leblok Security Laptop Faraday Bag helps isolate compatible devices from a wide range of wireless technologies, including:
- Mobile phone networks (2G, 3G, 4G, 5G)
- Wi-Fi
- Bluetooth
- GPS
- RFID
- Zigbee
- TETRA communications
It is also intended to help protect compatible devices against TEMPEST surveillance methods and electromagnetic pulse (EMP) events.
Simple to Use
- Place your laptop or other compatible electronic device inside the bag.
- Fold the opening over twice.
- Secure the fastening strap firmly.
Your device is now physically isolated from external wireless communication until removed.
Product Specifications
Product: Leblok Security Laptop Faraday Bag
External Dimensions (Closed): 480 × 370 mm
Manufactured in: United Kingdom
Construction:
- Triple-layer RF shielding material
- Waterproof outer fabric
- Reinforced stitched construction
- Dual-fold closure
- Secure hook-and-loop fastening
Who Is the Laptop Faraday Bag Ideal For?
The Leblok Security Laptop Faraday Bag is ideal for people who:
- Travel regularly with laptops containing sensitive business, legal or personal data.
- Need to isolate a laptop during border crossings, international travel or transit through high-risk environments.
- Want to prevent wireless interception or unauthorised data extraction.
- Prefer reducing unnecessary RF exposure while their device is not in use.
- Require dependable signal isolation for professional, government or security-related applications.
- Need a Faraday bag large enough for a MacBook, ultrabook or standard laptop computer.
- Appreciate products manufactured to high quality standards for long-term professional use.
Frequently Asked Questions
Yes. The Leblok Security Laptop Faraday Bag works on the same principle as a Faraday cage - the triple-layer RF shielding material creates a conductive enclosure that blocks external radio signals from reaching the device inside.
When correctly sealed, it physically isolates your laptop or MacBook from Wi-Fi, Bluetooth, mobile networks, GPS and RFID signals. The shielding material has been independently tested by the University of the Armed Forces (Germany) across a wide range of frequencies, and detailed test results are provided in the table on this page.
The best Faraday bag for a laptop needs to be sized correctly, use independently tested shielding material, and be built to a construction standard that holds up to repeated professional use. At laptop scale, the bag is larger than any phone or tablet Faraday bag, which means the closure is longer, the shielding surface area is greater, and any weakness in construction has a proportionally larger effect on shielding performance.
The Leblok Security Laptop Faraday Bag uses three layers of independently tested RF shielding material - not just one - paired with a dual-fold closure designed to minimise signal leakage, reinforced construction throughout, and individual inspection before dispatch. It is manufactured in the UK to the same standards applied across the full Leblok Security range.
This is one of the most practical professional applications for a laptop Faraday bag. When transported inside a correctly sealed Faraday bag, a laptop cannot communicate wirelessly - it cannot transmit or receive signals from Wi-Fi, Bluetooth, mobile networks or GPS.
It is worth noting that a Faraday bag addresses wireless signal isolation specifically. It does not prevent physical inspection of the device if authorities require it. For those travelling with sensitive business data, a laptop Faraday bag is typically used as one part of a broader data security approach alongside device encryption and access controls.
Flight mode is a software setting that can be enabled and disabled, and not all wireless interfaces are necessarily deactivated by it depending on device configuration. A correctly sealed Faraday bag provides a physical signal barrier that prevents wireless communication regardless of software settings - it does not depend on the device's operating system, firmware or configuration behaving in a particular way.
For situations where you need to be certain that a device is not communicating wirelessly, a correctly sealed Faraday bag provides a level of assurance that flight mode alone cannot match.
Laptops generate heat during normal operation, and this is a question customers understandably ask. The Faraday bag itself does not actively trap heat in an unusual way, but as with any enclosure, prolonged use with a laptop running at high load may lead to increased internal temperatures over time.
For short-term transport and storage - which is the primary use case for a laptop Faraday bag - this is not typically a concern. If you plan to store your laptop inside the bag for extended periods with the device switched on and running intensively, switching the laptop off or to sleep before placing it inside the bag is advisable.
TEMPEST refers to techniques used to capture compromising electromagnetic emissions from electronic devices - a particular concern for laptops, which emit more electromagnetic radiation during processing than smaller devices. The Leblok Security Laptop Faraday Bag is intended to help protect compatible devices against TEMPEST surveillance methods, as described in the product's technical documentation.
TEMPEST protection is primarily relevant in professional security, government and defence contexts where emission security is a specific operational concern. The independent laboratory test results provided on this page give detail on the shielding performance of the material across a wide range of frequencies.
No. Your laptop can remain switched on inside the bag. When correctly sealed, the bag physically isolates your device from external wireless signals regardless of whether the laptop is switched on, in sleep mode or powered off.
That said, for extended storage inside the bag, switching the laptop off or to sleep is advisable to avoid heat build-up during prolonged storage.
No. When the Laptop Faraday Bag is correctly sealed, your laptop is physically isolated from external wireless signals. Wi-Fi, Bluetooth, mobile data and GPS connections will not function while the device remains inside the bag, and no data can be sent or received wirelessly.
Once the laptop is removed, it will reconnect to available wireless networks and services that were previously enabled.
The Laptop Faraday Bag (480 × 370 mm closed) is designed to accommodate most laptop computers, including larger models up to approximately 16 inches. It is also suitable for MacBooks, ultrabooks, notebooks and tablet computers, as well as other compatible portable electronic devices that fit comfortably inside while allowing the bag to be correctly folded and sealed.
If you are unsure whether your specific device will fit, the dimensions above should be used as a guide. The device must fit with enough room remaining to allow the opening to be folded over twice and the fastening strap to be secured firmly.
