Life vest

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A man wearing a red life vest.

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. There are different categories of life vests. They are mainly different in how much flotation they provide. Some life vests inflate all by themselves, others need to be filled with air manually.