Features The Everlast Elite Hyperflex Bag is the ultimate tool for improving cardio, leg conditioning, and hand-eye coordination. Its unique design allows for easy movement around the target, making it perfect for advanced training sessions. The bag also features a removable swing bar for even more versatility in your training routine. The Elite Hyperflex bag has a dual locking spring design, allowing you to customize the way it performs. The base of the bag can be filled with either sand or water to keep it sturdy during training. The mid-sized foam ball is the perfect size and firmness for advanced target training. The bag is easy to assemble and comes with an Allen key for quick setup. Design allows for easy movement around the target, increasing cardio, leg conditioning, and hand-eye coordination. Normal Wear and Tear Not Covered Must be used with boxing gloves.