There are spikes designed for short sprints, long sprints, middle distances, long distances, cross country, the steeplechase, and field events. Some spiked shoes are cushioned like a training shoe. Others, in the interest of saving every ounce of weight, are stripped down to the bare essentials. The actual spike part of the shoe is called a "pin." Some shoes have three, others as many as eight. A spiked shoe may have a significant heel, no heel at all, permanent pins, or replaceable pins.