BumBakPak Hamptons Hybrid Messenger/Backpack Laptop Bag ChocoTango Large Award winning ergonomic design - Laptop Magazine's Editor Choice Bak2Pak Carrying System converts between ergonomic low riding backpack with Lumbar Bum Pads and convenient single strap Top-loading laptop compartment with heavy duty padding and snugfit adjusters to zip through airport security and protect your expensive laptop Tons of pockets to store all your Gadgets - Cell phone MP3 player PDA Power cords Cables Etc Additional features include Luggage handle pass-through Umbrella/newspaper holder Mesh water bottle holders Super tough water resistant materials Sternum and waist straps Quick release 1-button buckles Keychain holder Pen holders