A wind sock is a conical textile tube that shows the direction and strength of the wind. Typically found at airports, it helps pilots determine wind conditions before takeoff and landing. The open end of the sock points into the wind, while the fabric inflates, indicating how strong the wind is blowing. Wind socks are often brightly colored, making them easy to see from a distance. They are also used in various outdoor activities, such as kitesurfing and paragliding, where understanding wind conditions is crucial for safety and performance.