This is a posture correction supporter. It naturally corrects posture just by wearing it. I only tried it on once. It's a ¥2800 item on Amazon. ISRKU German Red Dot Award-winning brand For kyphosis, rounded shoulders, and posture correction Easy to put on, adjustable size, excellent breathability, prevents pain, supports the waist 360°, unisex Size: S ・Height: 120-150cm ・Weight: 27.5-50kg ・Waist: 45-75cm Color: Black Thank you for looking.