Yoga Stick Hunchback Corrector - Stainless Steel Body Figure Training Stick for Balance Training, Waist, and Muscle Relaxation Apparatus"Key Features:Retractable Design: Soft foam wrap, retractable design (21-34 inches), suitable for both children and adults, provideing versatility in training methods.Posture Corrector: Promotes a straighter, more confident, and healthy posture. Suitable for adults and children, encouraging an improved attitude for a better quality of life.Convenient Usage: No need to wear it all the time. Just 10-30 minutes per leisure day is sufficient. Suitable for the whole family with easy storage provided by the included lanyard.Targeted Correction: Specifically designed for individuals with a slightly concave waist, children, those with bowed heads, and long-term office workers. Helps pull muscles and spine back to their original positions, improving overall posture.Specification:Material: Stainless steel + foamLength: 54-86cmAdditional Information:Type of Sports: Balance TrainingTraining Sites: Waist, Muscle Relaxation Apparatus, Waist & Abdomen Exercise, Back, OtherModel Number: Humpback