Weight Lifting Training Waist Belt Gym Fitness Lower Back Brace Support Specification: Color: Black Size: L (31.5" - 35.4") Material: Neoprene Functions: 1. It can correct the posture effectively. 2. It can relieve back pain and speed up lumbaginous recovery. 3. It can help relieve the frustrations caused by injury. 4. Massages muscles and reduces pressure from the lower back.