Features: - Soft and breathable fabric gives you a comfortable feeling without pressure. - The wider shoulder strap is more effective to correct poor posture. - Adjustable shoulder strap with Velcro is more convenient to adjust the length of shoulder strap. - Promote blood circulation; Relieve muscle stiffness; Prevent strain during exercise. Specifications: Name: Flat Back Brace Posture Corrector Function: Assist to correct body shape( without medical effect) Material: Breathable sponge Color: black Length of strap adjustment: 50 to 110 cm. Applicable chest circumference: 40-48 inches. Applicable User: All adults, Children. Package including: 1x Upper Back Brace 2x Upper Back Shoulder