Some articles on feldbluse:

World War II German Uniform - Army (Heer) - Field and Service Uniform (Feldanzug / Dienstanzug) - Field Tunic (Feldbluse) Model 1936
... armed forces of the Weimar Republic, were near the end of a two-year project to redesign the Army Feldbluse (field-blouse) ... Compared to the Weimar-era uniforms the skirt of the feldbluse was shorter and the tailoring was more form-fitting due to Germany's adoption of mechanized warfare soldiers ...