A bouffant cap is a type of cap that completely covers the hair for use in cleanrooms and

other situations where it is important to avoid loose hairs. They are usually made of polypropylene or some other non-woven material, with elastic around the rim to keep it

tight around the forehead and the back of the head below the hairline. As they can be worn by any sex and over any hairstyle, bouffant caps are a popular and economical choice of

workplace head covering. Cafeteria workers' hairnets and hospital scrub hats are two common examples of bouffant-style caps.