When Used Regularly, The Straight Holder Supports An Upright Posture And Prevents Bad Posture And Tension. The Straight Holder Is Therefore Ideal As Supportive Therapy for Humpback, Kyphosis, Which Effectively Helps You With Back Pain, Poor Posture Or Hunchback. Make Yourself Embrace Your New, Confident Attitude. . Anytime, Anywhere Improve Posture, Thanks to The Soft, Light But Strong Shoulder Straps, Which Can Prevent The Skin From Being Pinched, You Can Wear It Comfortably When Driving, Vacuuming, Cooking And Working At The Desk. Posture Correction Is Made of Breathable, Strong, Washable And High Quality Materials for Long-Lasting Back Support. . Scientific Structure Designfirst Tighten The Posture Corrector And Adjust The Shoulder Pads. Second, Buckle The Strap Around Your Waist Snugly And Comfortably. Third, Pull The Elastic Back Straps And Attach The Velcro to The Waist Strap. Eventually Your Shoulders And Back Will Feel Stretched. Then Feel Relaxed And Comfortable. M: Bust 86Cm105Cm L: Bust 96Cm115Cm .