Materials: SBR Size: S/M: Shoulder width: 36-39cm/14.17-15.35in; Weight: 45-60KG L/XL: Shoulder width: 40-45cm/15.74-17.71in; Weight: 60-75KG 2XL/3XL: Shoulder width: 46-51cm/18.11-20.07in; Weight: 75-90KG Precautions: 1. Adjustable double-strap design fits different body shapes, providing full shoulder support and back pain relief. 2. Cross-compression shoulder straps effectively distribute shoulder and back pressure, improving poor posture. 3. Breathable and soft fabric is skin-friendly and comfortable, suitable for long-term wear, ideal for exercise, office work, and rehabilitation. 4. Suitable for various shoulder, neck, and back discomfort symptoms, such as muscle strain and poor posture. 5. Lightweight and easy to wear, suitable for various scenarios, such as fitness, sedentary work, and daily travel. Package Includes: 1 PC Adjustable cross-body straps