Long-term use and durability: The reinforced rubber tube maintains elasticity with regular use and remains odor-free. Durability is confirmed by precise longevity tests. Secure grip and comfort: A precisely structured surface delivers a firm, secure grip and fits hand contours for comfortable use. This design reduces fatigue and supports stable performance across all fitness movements. Scientific design for posture and upper body: Targets torso toning and posture improvement through focused shoulder and neck stretches. The design helps optimize back alignment and supports long-term, varied training results. Expanded training options: Enables back shaping and full-body training with multiple exercise modes and adjustable resistance bands for a holistic workout. Materials and build: Constructed with a reinforced rubber tube for durability and smooth operation, with a grip surface designed to stay comfortable during extended sessions. Use scenarios: - Posture and mobility: use for shoulder and neck stretches to improve posture after long desk days. - Home workouts: incorporate into routines for back shaping and upper-body toning with progressive resistance. - Full-body circuits: combine with adjustable resistance bands to vary intensity across exercises for a comprehensive workout.