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A personal flotation device (also named PFD, lifejacket, life preserver, Mae West, life vest, life saver, cork jacket) is a device designed to keep a wearer afloat and their head above water, often in swimming pools, rivers, or oceans. The term is inclusive of all types of such devices from life preservers to lifejackets to survival suits. They are often available in different sizes and different designs purposed for various levels of protection.
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