A sham is a decorative pillowcase that is used to add aesthetic variety to a bedding set. It is a cover that fits over a standard, king, or Euro pillow. Shams are typically used on decorative pillows that are removed from the bed at night, but they can also be slept on like normal pillowcases. They are often open in the middle of the back, with slightly overlapped fabric, or sometimes closed with a hidden zipper or buttons. Shams come in a variety of styles, colors, and materials, from silk to cotton, and everything in between. They can be found in simple solid color designs that match other bedding components or in modern, intricate designs. Shams can be used to enhance style, provide comfort, and change seasonal decor. They are usually sold in pairs made out of a fabric that matches a duvet cover. Unlike throw pillows, shams can be easily removed from their fills to be washed or replaced.