Here is a portable military-grade Faraday bag that protects your devices from solar flares, EMP, and hackers. The Goal Zero Yeti Faraday Bag blocks WiFi, Bluetooth, GPS, RFID, and cell signals. It has a water resistant exterior and soft handles. It meets the MIL-STD-188 125 standard.
This bag has two layers of shielding fabric to get the job done. You can get yours here.