Young Blonde Girl On The Floor With Pillows

The fill is surrounded with a cover or shell made of cloth or silk, known as the pillow case or pillow slip. Some pillows have a fancier cover called a sham which is closed on all sides and usually has a slit in the back through which the pillow is placed. Rectangular bed pillow cases usually do not have zippers, but instead have one side open all the time. It is recommended that all types of pillow covers be laundered periodically since they are the part that is in contact with a person's body. But even with regular washing, pillows tend to accumulate large amounts of dust and vast numbers of microbes among the fill and it is recommended that they be replaced every few years, especially for those with allergies.
Types
A pillow is designed to provide support and comfort to the body and head. There are three main types of pillows; Bed pillows, Orthopedic pillows and Decorative pillows, with some overlapping of use between these. The appropriate size of a bed pillow depends on the size of the bed. In general a twin bed goes best with a standard pillow while for queen and king sized beds larger pillows recommended.