Designed to improve strength and power, the chest expander is a portable, lightweight alternative to free weights and machines. Strengthen the upper body, open chest, shoulders and back, easy to carry and you can resistance train anywhere. elastic high strength spring, durable. With steel coil, pull-up bar and non-slip PU handle with high density, this fitness gem is very effective for building your body. The ergonomic handles offer a comfortable grip that will effectively prevent hand slippage. Perfect for adult men and women of all fitness levels and helps almost everyone to build muscle, melt fat, and get a perfect figure.