The tube material is TPE, which is tough and elastic. Ergonomic anti-slip handles provide a comfortable grip. Includes 5 rubber resistance bands to adjust strength. Strengthen your chest, arms, and shoulders. Overhead pull helps expand the upper back. The handles are made of hardened plastic with rubber grip inserts made of comfortable natural rubber. This ensures a secure hold during strength training. The bands can be attached and detached depending on the workout. Each resistance band adds additional tensile force, allowing the training to be individually customized. The curved handle design fits the palm and feels comfortable in the hand. The buckle design securely connects the handle and the rubber tube, reducing the risk of detachment. The adjustable chest expander allows free tension adjustment. The 5 tube expanders provide approximately 75 pounds of resistance. The chest muscle trainer is lightweight, compact, and foldable, making it easy to carry and store. Ideal for use at home or in the office to maintain fitness. Offers various exercise options to strengthen and shape different muscle groups.