Resistance Bands Chest Expend Er expander made of natural bold, thicken latex tube, high tensile strength and Eco-friendly anti-skid handle to keep you preventing your hand from falling off the chest exerciser.chest expander have 5 soft latex tube, easy to detach or reattaching the latex tubes for different strength intensity.Training your arm, chest, shoulders, back, your whole upper body. Simple structure is easy to be taken to office, Gym, camping or traveling, doing exercise anywhere, any time.