A chemise is a shirtlike undergarment, usually of linen, worm as an item of clothing from the 14th Century onward. It was worn by both sexes, differing primarily in length. The chemise is a period heraldic charge: the illustration is taken from the Basque arms of Mondunno, 16th Century [GAC fo.541v].
The chemise is affronty by default. See also jerkin.
Wynne ferch Rhodri bears as a badge: On a chemise argent, in pale three gouttes de larmes.