Mission Darkness Non-Window Faraday Bag for Phones (4-Pack) // Signal Blocking Bag Prevents Hacking Tracking Spying, Device Shielding for Law Enforcement Military Digital Forensics, EMP CME Protection

They work.

Very well constructed. Nice bags.

Blocked signal. Total silence. Put my Ham radio in one. I want to explore other possibilities for uses

It blocks basic signals. It doesn’t block the mic. Works as well as any other faraday bag.

They don't last long.

Funciona bien para bloqueo de señales lo uso poco pero a funcionado muy bien

Please increase the sizes

This company touts the made in USA, patriotic aspect, but it comes in a bag with stickers that say made in China. Don't pay extra for an equivalent item when you think you're getting the real deal. Merchant finally replied to email queries a WEEK later and smugly replied that they were transitioning production of some items to China, but will make USA made products available at a higher cost due to higher costs to make them in the US. Uhhhh...I already willingly paid more than twice what similar products charge for this reason, only to be scammed by a dishonest company. Most consumers understand this basic economic concept. I already gave these as gifts by the time they replied or they would have been returned. The bags are nothing special, btw.