When you need a commuting pack that efficiently doubles as both a lumbar pack for bike commuting and a comfortable shoulder bag, the Mountainsmith Ether 20 Lumbar/Shoulder Pack should be your first choice. The roll top feature secures all contents and, with both uses, comfortably conforms to your body and secures everything internally. Separate internal padded sleeves fit most laptops up to 15.4 inch screens, Kindles, and iPads. Additional features include side bottle pockets that are low-profile and won't snag things that you pass, a removable rain cover, and a stow-away Delta Compression Waistbelt. Perfect for your daily commute.