Not all underwear in the 1920s was made of woven silk and cotton fabric. 1920s everyday underwear was also made of knit fabric. Knit lingerie in the 1920s often came in white and pastel colors and was made of silk, rayon and cotton knit fabric. For my knit envelope chemise, however, I refashioned an old bedsheet!
Cotton knit ‘Union Suits cling with a smooth perfection that will delight you.’ (Montgomery Wards Catalog, 1926)