Backpack: Get an expandable travel backpack in black! Compartments: With many pockets, plus a USB charging port (power bank not included). Expandable: Can be expanded to increase the capacity - go from 23L to 35L! Waterproof: Waterproof and weather resistant, with a water repellent coating.. Material: Made using premium quality high density polyester with polyester lining. Size: 30cm (W) x 45cm (H) x 14cm not expanded OR 22cm expanded (D); 1.12kg. Expandable Travel Backpack | Black | Living Social