This Leather Speed Bag is an advanced way to train and hone your hand-eye coordination, while strengthening your arms and shoulders as you keep them up. Bushido’s Leather Speed Bag features a leather construction which offers reinforced strength and durability in the boxing and karate studios. When you have reached that advanced level of martial arts and boxing training, seal the deal by training with the Speed Bag. This will train you to focus on a moving target and teach you to maintain focus, all while building strength and working on your cardio.