A wind sock is a directional device that tells pilots about the wind's direction at a particular moment. It is also known by other names, such as wind cone, wind sleeve, or air sock. These terms are the synonyms of the word "wind sock" and represent the same item used to measure wind direction. A wind sock is a fabric tube that moves with the wind to indicate its direction and velocity. It can be found at airports, helipads, and other places where aircraft take off and land. The primary purpose of the wind sock is to provide pilots with crucial information to make safe landings and takeoffs.