Molded, plastic cleats are acceptable in high school baseball, as long as the spikes are molded appropriately, without any sharp ends. Molded cleats are generally used by newer players or players who play on artificial surfaces where metal spikes could ruin the integrity of the surface.
Traditional metal cleats are permitted for players in the 13U age division and higher. Metal cleats are critical on dry, hard surfaces for the best traction possible and are the preferred type for more experience players.
Rubber soled turf cleats are also permitted at the high school level. Turf cleats have small, rubbers spikes and are another good option for artificial surfaces. They also provide a softer surface for the foot.
Cleat rules specifically prohibit any alteration of cleats that would make them dangerous. Sharpening of spikes, adding metal tips and other alterations put the safety of players at risk during slides, collisions and other physical aspects of the sport. Any cleats deemed unsafe by the umpire cannot be worn.