1Durable: The triangular flag is composed of a stainless steel mast and a red flag surface, which is reliable and reusable, safe and sturdy, not easy to break or fade, and has a long service life. 2Lightweight and Convenient: The flag is made of nylon material, which is portable. Thanks to its lightweight and durable fabric, this flag can change even in the lightest wind, making it suitable for understanding wind direction. 3Easy to Use: The flag is easy to use, and when used in a ventilated space, the wind direction can be known. It can also be installed anywhere on the ship's hull, making it very convenient. 4Rust Prevention Performance: The flagpole is made of stainless steel material, which is suitable for humid environments such as the ocean. It will not have rust or other problems and will not affect the observation of wind direction. 5Eye Catching: The flag is red in color, so it can be hung far above the mast and can be seen from a distance, resulting in more rigorous results.