Cloak

A cloak or outer garment was worn over the top of the tunic. Both men and women wore an outer garment.
The cloak was usually made of heavier material than the tunic, and was held together around the waist with a belt made of cloth or leather.
People did not always wear a cloak. During manual labour it was easier to wear only a tunic.

A cloak was a rectangular piece of material. We can see from old drawings that the cloak was wrapped around the body. Later, certainly by the time of the New Testament, the cloak was worn as a wrap around the shoulders or over one shoulder.
In New Testament times, instead of the rectangular cloak, some men wore a Roman toga, which was not rectangular but had rounded corners.

A cloak was more than just an item of clothing. It was also often used as a blanket, which is why, according to Exodus 22:25-26, a cloak that was used as a deposit had to be returned to the owner before sundown.
Items could be carried in the folds of the cloak. In Ruth 3:15, Ruth uses her cloak to carry barley.