Bob & WeaveThe Rival B&W (Bob and Weave) is an excellent accessory for your heavy bag workouts. Perfect not only for your punching and offensive skills, but your defensive bob and weave skills at the same time. Easy to install on almost every heavy bag, you can combine 2, 3 or 4 at the same time on the same bag. The Rival B&W helps imitate the arms or a punch thrown at you from an opponent. Excellent for practicing your defensive and counter punching skills by