Remove product hang tag, take out card inserts and silica packet before use.
Anything placed inside the large internal Faraday pocket will ultimately be blocked for Cellular, WiFi, Bluetooth, GPS, RFID & NFC. This is signified by the Silent Pocket stitched logo and metallic sheen of the material.
Once electronics and items are inside, seal the top flap horizontally, keeping the material touching, with no gaps, and snug. If you find too much air is trapped inside, squeeze the bag together and start over.
Make sure you roll down at least 4 times and tightly secure with plastic external buckles on sides or top. When sealed properly (snug and with a tight roll), the bag will effectively block wireless signal and water from getting in. This bag instantly becomes waterproof and hack-proof.