Bests & Worsts Reviews from Amazon

This bag does exactly what the description says it will do, at least in terms of blocking signals. It is made of very sturdy materials, and I keep it as part of my EDC. I tested with my Otter Box-protected Samsung Galaxy S8+ and my S3 Frontier watch separately, and then I put them in together. Just for fun, I then put in my Galaxy Tab 4 8-inch tablet along with the phone (still in the Otter Box) and my watch. Although it was a little snug for all 3, I was able to successfully seal the bag. Check out the pictures, you'll see in the bag: 1. The phone and watch, 2. The phone, watch, and tablet, and 3. All devices sealed up. You can see the watch pressed against the front of the bag in the third picture. Once I dropped them in and sealed the bag according to the instructions, no signal penetrated the bag in either direction. Without access to an EMP device, I was unable to test that protection. Law enforcement officers can use this bag to preserve digital data on devices during an investigation. This protection would prevent a remote wipe of the device until investigators could get it into a Faraday Cage for further research. If you find yourself wanting to protect your devices from rogue signals, or if you work for a law enforcement agency needing to preserve digital data, this is your ticket.