BTW, if you are looking for a bag that adds a fashion statement there is also Celltei. I have their Backpack-o-Pet bag and most times use that instead of my Sherpa bag when traveling.

For carryon use, most Celltei carriers are designed specifically for airline in-cabin travel. Except for the open top designs such as their Mandarin or Lunar designs, up to the medium size, all Celltei carriers meet the airline requirements. The large size meets the requirements of about 70% of the airlines.

http://www.celltei.com