The Tom Bihn Synapse backpack is one of the best backpacks I have had the privilege of using. It's about 70% the size of a regular size full-sized backpack. However, it does offer a large main compartment for carrying a laptop or your iPad. Sometimes, size doesn’t really matter. The main compartment is divided into two compartments making it easier to find items inside. The Synapse also offers five outside, zippered pockets. The inside of the backpack is made of a stain resistance type material. The inside compartment is a yellowish color making it easier to see objects inside the backpack.