Travel cases for laptops are often bulky. Some barely fit under the seats on an airplane. Pictured is a nylon attache' received as part of a convention registration packet. It is large enough for a laptop. The handles and shoulder strap are strong, but there is no padding and only fabric not at all resistant to pushing and prodding from the outside.
Pressure against the screen of a laptop from even a finger poke can crack it. Once damaged, the repairs are so expensive that a new laptop is the only course remaining. Light cases made only of fabric mean no protection for the computer's screen.