The MIAmobi SilentPocket is made with high quality leather and a 99.9% pure Nano Silver lining, which provides Instant Privacy, it completely takes your mobile device off the grid. It stops GPS tracking, provides data protection, and prevents texting and driving. Voicemail rings, beeps, blings or vibes will not be heard. Texts and email will be received once the device is taken out of the SilentPocket. The big secret behind the SilentPocket series is the silver lining inside each bag.