G4Free RFID Sling Bag Crossbody Backpack Small Chest Shoulder Bag Hiking OutdoorRFID ProtectionBack hidden RFID signal blocking pocket, to protect your ID card, bank card, or phone from getting scanned and stolen. And protect your information security in public places. Multifunctional PocketVery lightweight only 0. 27kg. The size of the sling backpack is 7. 5 x 4 x 15 inches (L x W x H), good enough to accommodate the items you need daily outdoors. A hidden security pocket on the padded back can hold your passport. 2 side pockets