The Ortlieb Commuter Daypack City is a waterproof city backpack made of lightweight, durable nylon fabric. With its roll closure, large main compartment and padded notebook compartment, it provides a secure place for your documents and other gear no matter what the weather. And thanks to its outstanding carrying comfort, it\'s always a pleasant companion to take along.21LSpecification: Fabric: PS33, Height: 50cm, Width: 30cm, Depth: 15cm, Volume: 21L, Weight: 750g, .27LSpecification:Fabric: PS33,Height: 50cm,Width: 32cm,Depth: 21cm,Volume: 27L,Weight: 800g.