instead of the Reichswehr grey. 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 now spent much time in the confined space of a vehicle and a shorter jacket was less likely to pick up dirt from the seats. It also included an internal suspension system, whereby a soldier could hang an equipment belt on a series of hooks outside of the tunic. These hooks were connected to two straps inside the lining, which spread the weight of equipment without having to use external equipment suspenders. The M36 was produced and issued until the very end of the war, though successive patterns became predominant. SS field uniforms were of similar appearance externally but to fit their larger patches had a wider, feldgrau collar, and the lower pockets were of an angled slash type similar to the black or grey SS service-dress. The second button of an SS Feldbluse was positioned somewhat lower, so that it could be worn open-collar with a necktie. Due to supply problems the SS were often issued army uniforms. M40 Tunic The M40 uniform was the first design change in the standard army uniform. It differed from the M36 only in the substitution of feldgrau for the bottle green collar and shoulder straps, which began to be phased out in 1938/39, though most combat examples show this variation appearing in 1940, hence the unofficial M40 pattern. The troops liked the older green collars, and M40 (and later) tunics modified with salvaged M36 collars or bottle-green collar overlays are not uncommon. M41 Tunic The M41 is exactly the same as the M40, but with a 6 button front due to the decline of material quality, which by now was 50% or more viscose rayon and recycled shoddy. SS-specific uniforms nonetheless stayed with 5 buttons. M42 Tunic The M42 is essentially an M40/41 tunic, but with pleats removed from all the pockets to save on materials and production time. M43 Tunic The M43 saw the removal of all pleats and scalloped flaps from the field tunic, and pockets began to be cut straight rather than with rounded edges. Many M43 tunics were made with a much simplified version of the internal suspension system, or omitted it entirely. Field Blouse Model 1944 In late 1944, in order to cut down on tailoring