Amazon.com: Opastry Faraday Bags Military-Grade Shield Bag 。?Large 15L Capacity: Internal usable dimensions when closed: 17\" x 9\" (43.18cm x 22.86cm) round; capacity: 15-liters; folds flat for storage. ?Military-Grade Faraday Dry Bag: Designed for military and law enforcement forensics investigators; also used for grab-and-go missions, government and executive travel, personal data security, signal isolation, EMP/CME protection, and EMF reduction. ?Weatherproof and Waterproof: The exterior is made with black waterproof 500D PVC with welded seams and two layers of high-shielding TitanRF Faraday Fabric on all interior sides; used for shielding electronic devices during travel, in the rain, snow, near contaminants, and anywhere near water. ?Durable Dry Bag: Extremely durable dry bag with an adjustable and detachable shoulder strap (tote bag style), transparent front zipper pocket, and roll-down and clip shut closure. ?RF Signal Blocking: 100% shielding of WiFi (2.4 & 5GHz), Bluetooth, cell signals including 5G networks, GPS, RFID, and radio signals with an average attenuation of 90dB from low MHz all the way up to 40GHz; shields and accommodates devices such as laptops, cell phones, tablets, GPS units, transponders, two-way radios, and other electronic devices.