The Pee-Chee All Season Portfolio is an American stationery item that achieved popularity in the second half of the 20th century. It is commonly used by students for storing school papers. The folder, which was originally produced solely in a peach-yellow tone, was first manufactured in 1943 by the Western Tablet and Stationery Company of Kalamazoo, Michigan. Pee-Chees were later produced by the MeadWestvaco Corporation.