A windsock (a wind cone or wind sleeve) is a conical textile tube that resembles a giant sock. It can be used as a basic indicator of wind speed and direction, or as decoration.
At many airports, windsocks are externally or internally lit at night.[1] Wind direction is the direction in which the windsock is pointing. (Wind directions are conventionally specified as the compass point from which the wind originates, so a windsock pointing due north indicates a southerly wind.) Wind speed is indicated by the windsock's angle relative to the mounting pole—in low winds it droops; in high winds, it flies horizontally.
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