Features： 1、Three high resilience bars, memory support, correction of spine curve. 2、Perforated composite fabric, breathable and comfortable, not sultry. 3、Retractable strap, tightness is adjustable, open shoulder and straighten back, suitable for different body figure. 4、Provides support for the shoulders and back, helps prevent hunchback and spinal curvature, and maintains proper sitting, standing, and walking posture. 5、Restrain waist and tighten abdomen, gather chest and shape body, balances shoulder pressure. Specification： Item Type: Posture Correction Belt Function: Correct kyphosis, correct bad posture Features: Spine correction, four seasons universal, straighten hunchback, comfortable anti-strain, rapid shaping Optional Size: XS, S, M, L Scope of Application: Used in the following situations when it needs to be fixed or limited 1. Fracture of clavicle or scapula 2. Poor shoulder posture, correct chest backward 3. Acromioclavicular, sternal clavicle joint loose 4. Teen Humpback Size Chart: SizeBustSuitable HeightSuitable Weight(kg) XS50-70cm / 19.7-27.6in120-145cm / 47.2-57.1in25-40kg S70-85cm / 27.6-33.5in145-160cm / 57.1-63in40-60kg M85-105cm / 33.5-41.3in160-175cm / 63-68.9in60-85kg L95-115cm / 37.4-45.3in175-190cm / 68.9-74.8in75-110kg Package List： 1 x Posture Correction Belt 1 x Manual