Classy and Professional Pack Bag.

How can we say classy and professional for a pack bag?.. I guess colors and design are big factors to make a pack bag like these. Those are bags that could be used in schools but mostly for work with a look that is professional. That is why I made extra effort in selection of materials and coming up with suitable designs for each. There are similar bags but I want my creation to be different, and be suitable for any taste.