A lifejacket is a device worn by a person to keep them afloat in water. It is typically made of buoyant materials such as foam or air-filled chambers, and it is designed to fit snugly around the wearer's body. Lifejackets are often used by boaters and fishermen, as well as by people who participate in water sports such as surfing, kayaking, and canoeing. They can also be worn by anyone who is around bodies of water where there is a risk of drowning. In the context of product development, a lifejacket is a wearable device that is designed to protect the user from injury or death in the event of an accident. For example, a lifejacket may be equipped with sensors that detect when the user has fallen into water and automatically inflate to keep the user buoyant. Alternatively, it may be equipped with a locator beacon that helps rescuers locate the user in the event of an accident. Lifejackets are an important safety consideration in the development of any product that will be used near bodies of water.