Bunk beds are a type of bed that consists of two or more sleeping surfaces stacked on top of each other. They are commonly used in children's rooms, dormitories, and hostels to save space. The design allows for multiple people to sleep in a small area, making them a practical choice for shared living spaces. Typically, bunk beds are made from wood or metal and come in various styles and sizes. Safety features, such as guardrails and ladders, are often included to prevent falls. Bunk beds can also be customized with additional storage options, like drawers or shelves, to maximize functionality.