1) Irving Adler (Early 20th Century)
Though not a household name, Irving Adler represents the type of industrial designer whose work quietly underpinned the T-shirt’s ascent into mass production. In the 1910s and 1920s, factory-driven apparel innovations refined the plain cotton tee into a reliable base garment. Adler’s era is where the T-shirt learned to survive and endure, a canvas for breathability and practicality during hard labor and military service.