The chest developer comes with 2 foam handles to maintain comfort and reduce injuries during exercise. The band is made of natural latex with good elasticity, resistance value of 30LB, can be stretched more than 10,000 times, and long-term use is not easy to deformation. This chest developer can be adjusted by the number of resistance tube to choose the appropriate resistance and provide progressive resistance in the traditional exercise, thereby enhancing the chest, shoulders, arms and front core strength. It is wrapped by nylon material externally, which increases the feel of the hand and also plays a role in protecting athletes and latex tube.