Have you noticed that many
backpacks have a little leather square sewn on the front?
The little diamonds, called lash tabs or pig snouts have two
parallel slits cut out of the center. This lets you weave a cord
or string through and tie various items, such as shoes, a water
bottle, etc., to your bag. The strong little square is built to
hold your larger items while hiking or traveling, but it can also
be used for smaller objects like earbuds or anything you want to
get at quickly.