Cleat

Cleats or studs are spikes or studs that are attached to the bottom of a shoe to provide more traction (grip) on a soft or slippery surface. Shoes specially designed for several kinds of sports, such as baseball and all the different kinds of football, have cleats, so that the players do not slip on the ground so easily. Ice cleats (or crampons) are a type of spikes that usually are attachable to the soles of shoes to prevent slipping on ice.

Football boots have studs on their soles