Faraday cage phone case
The OFF Pocket is a faraday cage phone case that blocks all wireless signals (700MHz - 5GHz) from reaching your phone, shielding you from unwanted tracking or eavesdropping. It’s also an easy way to disconnect.
This project started in 2011 and was successfully launched on Kickstarter in 2013. But is currently discontinued pending a design revision.
The OFF Pocket is now part of the Victoria and Albert Museum's collection