Editing Backpack (section)

==Special-purpose==
[[File:תיק טרולי שחור שוויצרי בזווית.jpg|thumb|upright|A rolling backpack, a hybrid between a backpack and a [[Baggage|rolling suitcase]]]]

Some backpacks are specifically designed to carry certain items. Common examples include backpacks for small valuable items such as [[laptop]]s and [[camera]]s;<ref name="Horovitz, 1A" /> backpacks designed to hold laptop computers in particular generally have a padded compartment to hold the computer and medium-sized pockets and flaps to accommodate accessories such as charger cables and mice. These are especially common in college and university settings. In order to supply these devices with electricity, a few high-end backpacks are equipped with solar panels.<ref>{{Cite news |url=https://www.npr.org/templates/story/story.php?storyId=103230940 |title=Sun Inspired: How To Build A Solar Backpack |last=Kalish |first=John |publisher=[[NPR]] |date=19 April 2009 |url-status=live |archive-url=https://web.archive.org/web/20090423025905/http://www.npr.org/templates/story/story.php?storyId=103230940 |archive-date=23 April 2009 |access-date=10 May 2009}}</ref>

Rolling backpacks are backpacks with wheels on the bottom and an extending handle. Because of their design, rolling backpacks reduce the strain on the user, though the shoulder straps may be used to carry the pack for short distances when the terrain is not suitable for wheels. Rolling backpacks are most commonly used while traveling by airplane or train.

[[Hydration backpack]]s are also available. These light daypacks are specifically designed to hold water in a special water bladder (also known as reservoir), and their purpose is to allow the carrier constant fluid hydration handsfree, so that the carrier can focus on their task without having to stop to get a [[water bottle]] out.