3-in-1 Foam Jumping Box for Jump TrainingKey Features Build Power & Strength: This jumping box is the best exercise tool to increase your leg strength! The enhanced training design will allow you to form and strengthen your muscles in a short period of time. In addition, by doing jumping exercises, your balance and stability will be greatly improved. Multiple Height Options: This foam jumping box is versatile enough to meet all your training needs. One box is available in three different