Features: Punching Speed Training The portable double-end ball is specifically designed for fighters to enhance their punching speed and boost up their accuracy while they are at it. Optimum Flexibility The adjustable rubber bungee cord grants optimum flexibility in all directions, returning the ball back despite getting hit from different acute angles. Wear-resistant and Durable The speed ball is made from top-notch PU leather materials, wear-resistant and durable, reinforced seams for long-lasting durability. Adjustable Elastic Rope It also enables the users to adjust the boxing bag to suit their height and reach. The double-end ball can be used with bag gloves, hand wraps or even with bare hands. Applicable People The boxing ball can be used by boxers and martial artists, Muay Thai users and so on.