The Fielder's Dome Mat® is now widely used by some of the top instructors and coaches in baseball and softball. It features 9 rubber domes that deflect the rolled balls. You should expect about 30% of the balls to pass through the domes to provide some unpredictability. Practice one-on-one with a partner or set up a line of mats for the perfect team practice drill! Mat constructed of durable plastic with rubber domes. Can be used on any flat surface – clay, natural turf, artificial turf, and concrete! The mat is perfect for any level of play and is ideally suited for players just entering the sport so their fundamental skills are developed early on. It revitalizes practice sessions and can also be used at home with parents or friends while replacing old methods of using cones and objects that constantly need repositioning.