I bought this bag for a 13.3-inch Ultrabook from Asus. This fits like a glove in the large main compartment. This is well padded and has a strap with Velcro closure to the notebook secure. On the front there is another compartment. This is divided clever. There are 3 smaller pockets for example. Mouse, ext. Hard disk, power supply. Behind it is a large compartment, ie quasi double bottom. Find longer cables a super home.