
Zero-drop shoes are a type of running shoe with a unique design that levels the height between the heel of the shoe and the toe. The purpose of zero-drop shoes is to keep your foot parallel to the ground so you land more in the center of your mass during your stride.
The sole of a running shoe is measured by the distance between your foot and the ground, known as its stack height. Zero-drop running shoes have the same stack height at the heel of the shoe as they do at the toe.