In Finland, a pefletti is a simple device used in a sauna. It is a sheet of paper, cardboard, cloth, foam rubber or other soft material that is placed on the sauna bench and then sat on. Its purpose is to prevent the user's bare buttocks from directly touching the wooden bench and thus feeling uncomfortable because of the heat. Another reason is to maintain sanitary conditions in a sauna with a wide user base by preventing genital contact with the bench. The pefletti come in both disposable and re-usable varieties. The word pefletti is a combination of the Finnish word "peffa", which is a mild slang word for one's behind, and the Swedish word "tablett". A sauna on Lake Vättern, in Karlsborg Municipality, Sweden. ... A blank sheet of paper Paper is a commodity of thin material produced by the amalgamation of fibers, typically vegetable fibers composed of cellulose, which are subsequently held together by hydrogen bonding. ... Corrugated cardboard. ... It has been suggested that Textile be merged into this article or section. ... Ethylene-vinyl acetate is commonly known as acetate or EVA. It is the copolymer of ethylene and vinyl acetate. ... Trunks A tree trunk as found at the Veluwe, The Netherlands Wood is a solid material derived from woody plants, notably trees but also shrubs. ... Slang is the use of highly informal words and expressions that are not considered standard in the speakers dialect or language. ...