Many people are confused and think that a packable daypack is the same as a backpack. That is usually not the case. There are some similarities with the size and make of the daypack and a backpack.
In some cases, a daypack is also called a backpack. They are also both great for carrying things while walking around town, on campus, or even while going sightseeing.
Nevertheless, there are some distinguishable characteristics of daypacks that make them a lot better for traveling and sightseeing, than it will be with a regular backpack.