Floaters are objects that are designed to float on water. A life vest is a type of floater that is specifically designed to keep a person afloat in water. It is typically made of buoyant materials and has straps or buckles to secure it around the body. A life vest is an essential safety equipment for water activities, such as boating or swimming, as it helps prevent drowning by providing buoyancy and keeping the wearer's head above water. Therefore, the correct answer in this case is "Life vest".