As the correction belt is breathable and adjustable, you can easily wear it even under your clothes. By aligning properly your posture, it can help alleviate back, neck, shoulder and clavicle pain. The back posture corrector can provide strong support from all angles and gently disperse the tension you need for alignment and stability without hurting the back. Made of suede microfiber and nylon, it is soft to touch. There are 6 sizes for you to choose from. It is suitable for both men and women. Item Name: Correction Belt Material: Nylon,Suede Microfiber Features: Size Details: Size: S, Bust: 46cm-68cm/18.1"-26.8", Suggest Weight: 20kg-40kg (Approx.) Size: M, Bust: 68cm-91cm/26.8"-35.8", Suggest Weight: 40kg-80kg (Approx.) Size: L, Bust: 91cm-119cm/35.8"-46.9", Suggest Weight: 70kg-100kg (Approx.) Size: XL, Bust: 119cm-150cm/46.9"-59.1", Suggest Weight: 80kg-120kg (Approx.) Size: 2XL, Bust: 140cm-155cm/55.1"-61", Suggest Weight: 120kg-135kg (Approx.) Size: 3XL, Bust: 155cm-170cm/61"-66.9", Suggest Weight: 135kg-150kg (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Correction Belt