Choosing your size: Use a soft flexible tape measure to find the circumference just below your chest, under your sternum; multiple sizes available up to extra large and it is recommended to size up if you fall between sizes or have broad shoulders | Easy adjustment: Confidently secure your shoulders in the proper position using BraceAbility’s posture support; designed with medical-grade fastener closures allow for a simple application and adjustment | Breathable material: This upper back brace is constructed with wide padded stockinette covered straps and felt covered back pad which make this brace ideal for all parts of your day or night to include sleeping; promoting comfortable posture correction | Correct posture: This adjustable posture corrector is designed for addressing poor posture in the back, shoulders, and neck; treating fractured clavicles and providing pain relief for collarbone or shoulder injuries | Figure 8 splint doubles as a posture trainer promotes straight, upright posture by gently pulling your shoulders back.