equipment to help the wearer keep afloat in water. A life vest (also called Personal flotation device, lifejacket, or cork jacket) is a special type of clothing. The vest makes people float in water. It also keeps their head out of the water so that they can breathe.
Float vests and jackets are worn over swimming costumes or shorts to help children achieve a natural position in the water when learning to swim. They are a buoyancy aid so work with a child's natural buoyancy to help increase their safety level when in water.