Specifications: Material: polyester, Comfortable and ergonomically designed to straighten the back and expand the chest. Made of highly quality materials, breathable, , comfortable to wear, neat stitching. Supporting the shoulders and back helps prevent hunchback and spine bending, corrects bad postures, maintains correct sitting, standing and walking postures. Helps prevent myopia, gently pull back the shoulder when correcting the spine, straighten the neck and . Color: gray Size: (fit chest) S: 71-81cm (27.9"-31.8") M: 81-91cm (31.8"-35.8") L: 91-111cm (35.8"-43.7") Features: Comfortable and ergonomically designed to straighten the back and expand the chest. Made of highly quality materials, breathable, , comfortable to wear, neat stitching. Supporting the shoulders and back helps prevent hunchback and spine bending, corrects bad postures, maintains correct sitting, standing and walking postures. Helps prevent myopia, gently pull back the shoulder when correcting the spine, straighten the neck and . Package included: 1 X Anti-Humpback belt Note: The pictures are only for reference, please make the object as the standard. Thank you for your understanding! Notes: 1. Please allow 1-2CM differs due to manual measurement. 2. Real color may slightly different from pictures due to computer screen's resolution,brightness,contrast etc.Hope understanding.Have a nice shopping day. You can use it not only while sitting in front of the computer or driving, but also while exercising or gardening.Improve your overall posture at work or in life. Helps prevent myopia, gently pull back the shoulder when correcting the spine, straighten the neck and . Supporting the shoulders and back helps prevent hunchback and spine bending, corrects bad postures, maintains correct sitting, standing and walking postures. Made of highly quality materials, breathable, , comfortable to wear, neat stitching. Comfortable and ergonomically designed to straighten the back and expand the chest. Material: polyester,.