CageBag V2: Our Source List
1. Faraday Cage: Physics 101
A Faraday cage is a well documented physical principle dating back to Michael Faraday in 1836. It works by
redistributing electromagnetic charges around a conductive enclosure, thereby canceling out any electromagnetic
radiation inside. This is not speculative. It is used in sensitive electronics labs, MRI rooms, and aerospace
applications. The CageBag V2 uses this exact principle, scaled to pocket size.
Evidence and standards: Faraday shielding is a foundational result in electromagnetics and applied routinely in engineering practice. See IEEE and university treatments of the phenomenon.
2. EMF and RF: Your Phone is Constantly Emitting Radiation
From cellular data to Bluetooth to Wi Fi to GPS, your phone is a constant source of low level radiation. The World
Health Organization and National Institute of Environmental Health Sciences have both catalogued these emissions extensively. EMF is cumulative and proximity dependent, meaning it is strongest closest to the body. That is exactly where you carry your phone.
Evidence and standards: RF transceivers are intentional radiators and are regulated for exposure and emissions. Government sources document the modalities and exposure basics.
3. Airplane Mode Still Emits Partially
Contrary to popular belief, airplane mode does not cut off all signal. GPS and Bluetooth can remain active
depending on the device, and internal circuit noise can continue emitting small but measurable EMF. Lab tested
EMF meters confirm residual signals even when offline. Only physical isolation via Faraday shielding blocks
everything at once.
Evidence and standards: Platform documentation confirms that Wi Fi or Bluetooth can be re enabled in airplane mode and that GPS reception is independent of cellular radios. Electronics also fall under unintentional radiator limits.
4. Independent testing
Independent testing frameworks show that high quality Faraday materials can block radiofrequency signals to very high attenuation when constructed properly. These materials are used by defense, law enforcement, critical
infrastructure, journalists, and researchers to avoid tracking or interception. CageBag uses premium conductive
shielding fabric to ensure blackout performance. Performance is verified against recognized measurement
practices, not marketing decks.
Evidence and standards: Shielding effectiveness is characterized using methods such as IEEE 299 and ASTM D4935, with attenuation reported in decibels across frequency.
5. Signal Behavior: Distance Cuts Radiation
The inverse square law often governs EMF intensity in the far field. Double the distance and the exposure drops
substantially. Pocket placement equals essentially zero distance. A Faraday enclosure completely interrupts the
field source. That is the logic behind our design. Do not just reduce exposure. Eliminate it.
Evidence and standards: Classical electromagnetics and exposure guidance use distance and time as primary reduction variables. A shielded enclosure changes the boundary conditions entirely.
6. Focus Gains with Faraday Enclosures Anecdotes and Emerging Studies
Educators removing phones from classrooms often report increases in attention and cognitive clarity. When your phone stops pinging, your mind stops anticipating disruption. Early studies in educational and workplace
environments support reducing device presence to improve attention and task persistence. A practical takeaway is simple. If the signal cannot reach you, the compulsion loop is interrupted.
Evidence and standards: Behavioral findings align with attention economics research. A physical barrier is the simplest way to enforce a no signal condition.
7. Proper Construction Matters
Faraday shielding is only as good as its weakest point. Seams, apertures, and low conductivity fabrics can
compromise protection. We use durable layered shielding with a magnetic seal that maintains continuous closure. It is tested for long term performance. This is not novelty. It is engineered shielding.
Evidence and standards: Measurement methods specify test setups, apertures, and bonding because construction quality strongly influences results.
8. Physics Still Rules
The principle of electromagnetic attenuation through conductive materials is universally accepted and tested in peer reviewed physics. Faraday enclosures are effective across a very wide spectrum when designed correctly.
Experiments have shown signal attenuation exceeding very high decibel levels when shielding is fully intact. This is physics doing its job.
TL;DR Here Is Why It Adds Up
Claim: Faraday shielding works.
Scientific Basis: Proven by physics and used in industry, labs, and military settings.
Claim: Phones emit EMF constantly.
Scientific Basis: Supported by WHO, NIEHS, and independent studies.
Claim: Airplane mode is not enough.
Scientific Basis: Radios can be re enabled and residual emissions from internal
circuits remain subject to unintentional radiator rules.
Claim: Realistic signal loss occurs.
Scientific Basis: EMF drops dramatically when distance or shielding is applied.
Claim: Quality makes a difference.
Scientific Basis: Only well constructed enclosures maintain effective attenuation
across frequency.
Why This Matters
CageBag V2 is not based on fear. It is built on engineering. Whether you care about privacy, presence, or peace of mind, this product gives you the kind of silence you can measure with a spectrum analyzer.
References and Standards
IEEE Std 299: Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures.
https://standards.ieee.org/ieee/299/3090/
IEEE Std 299.1: Measuring Shielding Effectiveness of Planar Materials and Small Enclosures.
https://standards.ieee.org/ieee/299.1/4061/
ASTM D4935 18: Standard Test Method for Measuring the Electromagnetic Shielding Effectiveness of Planar Materials.
https://www.astm.org/d4935-18.html
U S FCC 47 CFR Part 15 Unintentional Radiators.
https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A/part-15/subpart-B
Apple Support Airplane Mode Wi Fi Bluetooth and Location Services behavior.
https://support.apple.com/en-us/102647
Google Android Support Airplane mode Wi Fi and Bluetooth can remain on.
https://support.google.com/pixelphone/answer/12639358
GPS dot gov How GPS Works receive only.
https://www.gps.gov/multimedia/poster/poster-web.pdf
University treatment Mathematics of the Faraday Cage S J Chapman et al.
https://www.ucl.ac.uk/~ucahdhe/14_Chapman_Hewett_Trefethen_FaradayCage.pdf
Peer reviewed review of Electromagnetic Shielding Fabrics J Yin et al 2022. https://pmc.ncbi.nlm.nih.gov/articles/PMC8838001/
General explanation of Faraday cages Wired Physics of Faraday Cages.
https://www.wired.com/story/the-physics-of-faraday-cages/