Introducing the Metro Backpack. The Metro is a thin-profile commuter backpack. What Can the Metro Backpack Carry? All of your daily commuting essentials. This bag easily accommodates your magazine, travel guides, passport, smartphone, wallet, keys, headphones, along with your laptop. Materials and Construction: Exterior: Extremely durable black ballistic nylon in black. Black YKK zippers and black hardware. Interior: Black cordura nylon interior with one large, internal zipper pocket 6" in depth by 9" long. Two sleeves for your pen and smartphone. Includes matte black key clip inside. It's quite black. Size: 13" length, 16" height and 3.5" width (33 cm x 40.64 x 8.89 cm) 11.93 liters.