I searched very long and in many stores and sites for the perfect laptop sleeve/bag. The Casuri envelope is just that, a perfect mix of durability, function and fashion. I receive complements on the bag constantly.
 

This has been one of the best laptop bags I've ever owned. I purchased it for my 13.3" Macbook and it fits with room to spare. In fact, I am also able to fit a file/folder or two with the laptop in the main compartment. Another thing I appreciate is that the bag is padded without being bulky or heavy. Personally, I love the stripe pattern, and it looks even better in person. The only issue I have experienced is that the outside compartment is rather shallow, so if your laptop batteries or other accesories are very thick, squeezing them in may be an issue.