A life jacket is a personal flotation device designed to keep a person afloat in water. It is typically made from buoyant materials like foam or inflatable air chambers, allowing it to provide support and prevent drowning. Life jackets come in various sizes and styles, suitable for different activities such as boating, swimming, or fishing. Wearing a life jacket is essential for safety, especially in situations where there is a risk of falling into water. Many countries have regulations requiring life jackets on boats, and they are often used in water sports. Properly fitted life jackets can significantly increase survival chances in emergencies.