POSTURE CORRECTOR – – This back brace posture corrector helps to pull your round shoulder back to align your spine the way it should be, improving your overall spinal health. EASY TO USE — Put the brace strap over your shoulders like a backpack and tighten the side straps until your shoulders are no longer slumped; Use the Hook & Loop to fix or adjust its size freely; The size is as shown in the picture and please ask if unsure about fitting as we will further advise. COMFORTABLE BREATHABLE MATERIAL – – Made by breathable, skin-friendly, thin, elastic material, washable and lightweight. ADJUSTABLE — This is a highly adjustable design of the hunch back brace that makes it easy to adjust the corrective force, allowing it to fit different body sizes.