Features1Force the shoulders to totally stretch, improve bad habits, and reduce the burden on the shoulders and cervical spine. 2Ergonomic designs, fits the spine better and reduces back pain. 3Hook&loop designs, easy to adjust the tightness, bring you convenience. 4Maintain natural straightness and relieve muscle fatigue caused by poor posture. 5Provides support for the shoulders and back, helps prevent hunchback and spinal curvature, and maintains proper sitting, standing, and walking posture.SpecificationCondition: 100% Brand NewItem Type: Back Correction BeltColor: Black+RedScope of Application: Chest backward hunchback, straighten back & beautify back, cervical spine painFunction: Ergonomic designs, relieve back pain, open shoulder and straighten back, improve hunchbackApplicable People: Children / Adults UnisexOptional Size: XS, S, M, L, XL, 2XL, 3XL, 4XL, 5XLWear Process:The First Week: The adjustment period, should not be too tight, let the back adapt first.The Second Week: The retention period, adjust the tightness a little to let the back get used to it.The Third Week: The adaptation period, it is recommended to wear it for about 2 hours every day.Size Chart:SizeLengthHeightXS86cm / 33.9in45cm / 17.7inS98cm / 38.6in45cm / 17.7inM100cm / 39.4in45cm / 17.7inL102cm / 40.2in45cm / 17.7inXL104cm / 40.9in45cm / 17.7in2XL106cm / 41.7in45cm / 17.7in3XL108cm / 42.5in45cm / 17.7in4XL110cm / 43.3in45cm / 17.7in5XL115cm / 45.3in45cm / 17.7inPackage List1 x Back Correction Belt