For a full, high-power cardio fitness workout incorporate leg kicks into your routine. Combat Sports designed the Muay Thai style heavy bag specifically for training leg kick. Allowing you to increase your flexibility, muscle strength and cardio endurance. Features: Synthetic leather construction This bag is unfilled Includes heavy-duty chain Size: 13" x 72" Additional Details: Installation Notes: Springs are suggested when hung from home rafters/support beams to minimize the shock to home structure