VEVOR multi-functional signal blocking bag set. Our faraday bag set can block enough various signals such as call data, bluetooth, Wi-Fi, GPS, RFID and radio signals to prevent tracking and protect your privacy. Made of high quality non-itchy silicone coating, fiberglass and shielding metal fibers, can withstand high temperatures up to 2000°f, high temperature resistant and splash-proof, multiple sizes of pouches can be sorted for large laptops, tablets, cell phones, cards, cash, documents, radios, GPS units and other electronic devices, provide security for your credit cards, passports, cell phones, laptops, keychains, bluetooth, GPS devices, etc. Color: Black.