Promote safety and reduce collisions, injuries, broken bones, spiking, etc. The white half sits in fair territory, the orange Safe portion sits in foul territory. The batter may touch the orange part on his first attempt at first base. Heavy duty 18 oz. vinyl covers (double layered on top for additional strength) and rebounded foam filling. Three nylon straps with metal buckles and two steel spikes with each base. (4 spikes total)