Jump boots are a type of combat boot designed for paratroopers featuring calf-length lacing and rigid toe caps. The style was developed in many countries simultaneously with the adoption of airborne infantry forces during World War II. Modern jump boots are earned in some countries and therefore have become a mark of achievement and distinction, mainly worn as dress and parade boots. 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"). It is also a paratrooper tradition to lace jump boots in a ladder or cobweb style[1][2][3][4] which increases ankle support during a parachute jump.