The design originates from imperial Austria-Hungary, but is best known for its widespread use as M43 field cap (Einheitsmütze) used by the German Wehrmacht and SS during World War II.
This was the first in the family of caps, and was recognized by a high peak, a teardrop shaped top, a short bill, and a small skirt that folds down to protect the ears in cold.
During World War I, this cap was made of Hechtgrau (pike grey) wool and had a turn-down brim to cover the wearer's ears in cold weather.
Most modern M43 field caps are of a slightly different cut than the original M43, with a wider top, but still very similar to the Gebirgsjäger Bergmütze of World War II.
Additionally, all other army units wear a simplified version of the M43 cap, without the fold-down ear flaps, in standard Flecktarn camouflage with a BeVo cockade on the front.