9. 8 FEET LONG: This 9. 8+ feet air mat gymnastics Tumble Track has a total inflated size of 118. 0' X 39. 4' X 4. 0' Inch (lxwxh) and provides extra-wide Track pad cushion for full-body support for the stunt, back handspring, hand stand practice, and more COMFORTABLE AND BOUNCY: The air tumbling track mat inflatable gymnastics mat features a comfortable and bouncy crash tumble mat design perfect for yoga, gymnastics, cheer practice, martial arts training. Ideal for home, fitness gym, park, and beach WATERPROOF GRADE DESIGN: SerenLife inflatable air mat tumble track gymnastics equipment has a waterproof rated design so it can also be used on water as floating beach mat or for any poolside water sport activities