Five adjustable tension levels that let you tailor the workout to your fitness level and progressively increase resistance for stronger, longerlasting muscle engagement. Elastic chest expander with a sturdy PP construction for a secure grip and reliable performance during intense workouts. Armfocused resistance control: adjust by the number of tubes to target different muscle groups; the chest bulge is built with five soft latex tubes and an antler buckle for quick installation and removal. Enhanced upper body training: effectively target and strengthen your chest and arms while engaging core muscles to improve stability and overall training efficiency. Materials and components: five soft latex tubes and a durable elastic chest expander designed for repeated use; quickinstall/removal antler buckle for convenient setup. Use scenarios: Athome strength routine: start with fewer tubes at a lower tension to warm up, then increase resistance to train chest, shoulders, and arms, while lightly engaging your core for stability. Core and upperbody conditioning: perform chestextension movements that recruit abdominal muscles to enhance core stability during regular workouts. Travel or office breaks: compact, portable chest expander for quick 5–15 minute sessions to maintain conditioning on the go, with easy tube adjustments for different exercise needs.