The ProMounds Training Mound is perfect for any youth baseball league. It allows you to convert any field into a baseball field in minutes. Throw from the official size rubber and land on the dirt. This mound is constructed from lightweight, high density foam, PRAT (ProMounds Rubber Armor Technology), and spike resistant artificial turf. The high density foam creates a durable, lightweight design. The PRAT technology seals the foam and will not scratch gym floors. The spike resistant artificial turf completes the mound giving you a real game feel. Comes with green turf.