The style was developed in many countries simultaneously with the adoption of airborne infantry forces during World War II.
The uppers are generally made of smooth black leather with toe-caps and heel counters that accept a high polish ("spit-shine" or "spittle-shine").
Although less flexible than the lighter standard issue boot—and therefore often less comfortable when marching, especially when cold or not well broken in—such specially reinforced footwear was seen as a practical necessity, as upwards of 30% of paratroopers were expected to suffer lower extremity injuries during a combat jump.
[7][8] While these boots are sometimes worn by non-paratroopers in Portugal, only paratroopers wear them with surplus green paracord instead of the usual black lace.
During World War II, the British Army issued trial copies of Fallschirmjäger-type side laced boots in the early days of the Parachute Regiment, but they were not adopted.
Certain U.S. Army soldiers, notably those parachute-qualified and assigned to an airborne or special forces unit, are authorized to wear jump boots with their dress uniforms.
[12] A modified version of the paratrooper boot was issued to U.S. Navy personnel working on flight decks, and aircrewmen.