The Thule Tact has a 21L capacity and you can easily take it along for school or a working day. The main compartment has a 15-inch laptop compartment, a tablet compartment, and different accessory compartments. You can also safely store your passport and cards in the RFIDBLOCK. You always have your keys on hand, thanks to the useful lanyard. The bag also has a special side compartment for your public transport card. This way, you can hold your bag by the scanner without removing your public transport card from the bag. You can also find a mesh side compartment, so your drinking bottle stands upright in the bag. You can easily detach the shoulder strap, so you can attach the bag to a chair or table. Note: the size of your laptop, like 15 inches or 17 inches, is the screen size, not the size of your whole laptop. If the bezels around your screen are wide, choose a laptop compartment in a larger size. That way, you can be sure your laptop fits.