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The Faraday Cap


Designed for everyday adventures, the Faraday Cap is an update of a classic. Any cap can block the sun, but ours also blocks wireless radiation.
  • Blocks 99% of wireless radiation (3G, 4G, 5G, Wi-Fi, Bluetooth)
  • Wavestopper inside lining: 44% cotton, 39% silver, 17% polyester
  • Adjustable fit

Wireless Radiation-Proof

99% cell phone and Wi-Fi radiation blocked

UV Protective

Blocks dangerous UV light

One size fits all

Stay fresh longer

Machine washable

Naturally antimicrobial and anti-odor

Feeding America

For every purchase you make, Lambs will donate 5 meals to Feeding America. Learn more.

Our Wavestopper Technology

Electromagnetic radiation cannot pass through holes in conductive material which are smaller than their wavelength. This way, it is possible to shield an object from EMF by surrounding it with a conductive wire-mesh like our Wavestopper Technology.

When encountering this electromagnetic shield, the radiation induces a displacement of electrons inside the conductive material, which causes, in return, the radiation to be reflected to the outside instead of going inside the shielding.

We used this scientific fact to make our Wavestopper fabric: the silver lining acts as a wire-mesh and shield what’s inside from EMF. This technology was certified by the same laboratory that certifies NASA spacesuits: the test results state that our fabric blocks 99% of microwaves, which includes wifi radiation, bluetooth, and cellphone radiation.

Free Shipping

Free US delivery over $100

Free Returns

If you don’t love it, send it back for a full refund.*

*exclusion apply for Pasteur products due to covid19 safety

Feeding America®

5 meals donated for every purchase you make.