Buoyancy devices are tools designed to help individuals stay afloat in water. They work by providing additional lift, counteracting the force of gravity. Common examples include life jackets, inflatable rafts, and swimming rings. These devices are essential for safety in various water activities, such as boating, swimming, and rescue operations. The effectiveness of buoyancy devices depends on their design and materials. Most are made from lightweight, buoyant materials like foam or inflatable air chambers. Proper use and fitting are crucial to ensure they function correctly, providing the necessary support to prevent drowning and enhance safety in aquatic environments.