【Product Description】 Size: L size Shipping via Yu-Packet Post No price reduction 【Notes】 Because it will be sent via post, the item will be taken out of its box, and the box will be folded in half. Therefore, it is being sold at a lower price. If you do not need the box, please send a message. (QR code video is currently unavailable) 【Supervised by a current athlete (JRA jockey)】 Supervised by HOKUTO Miyazaki, a neurological trainer and a chiropractic training YouTuber (30,000 subscribers), this posture correction supporter (kyphosis correction supporter) was created based on neuroscience. 【Biofeedback Mechanism】 Uniquely developed! Three special-shaped "metal spines" provide feedback not only to the spine but also to the sensation of the shoulder blades to the brain! This provides a more effective solution for posture improvement, setting it apart from conventional "forceful correction." ※Biofeedback is a technique that allows you to control sensations that are normally difficult to feel by providing feedback to the brain through a special device. 【3D Three-Dimensional Hold Structure】 The ergonomic 3D structure naturally guides your body into the correct posture. Combined with breathable mesh and support pads (under the arms), it achieves more comfortable posture improvement! 【From the Developer】 "My posture improved by force, but I felt more discomfort and physical problems..." Our product was created to solve those problems. Please try our approach that focuses on fundamental posture improvement. - Number of students: 30,000 YouTube subscribers, 7,000 online school students