Poplin, also called tabinet, is a fine wool, cotton or silk fabric that has a vertical warp and a horizontal weft. Nowadays, the name refers to a strong material in a plain weave of any fiber or blend, with crosswise ribs that typically give a corded surface.
Poplin
A shirt is a cloth garment for the upper body.
Charvet shirt from the 1930s, Norsk Folkemuseum, Oslo, Norway
Factory sewing
Shirts on a conveyor
Shirts awaiting finishing