The perfect tool for teaching tumbling skills, this mailbox trainer helps young gymnasts gain a natural tumbling form. Polyurethane foam center offers enhanced comfort, cushioning, and support. It's covered in heavy-duty, reinforced 18 oz vinyl for enhanced durability. The trainer will quickly become an important training asset when coaches want to increase their students' confidence, while also developing skills. Trainer is 36″L x 16″W x 20″H; 15 lb.