Relieve Lower Back Pain] Andou back support contains 4 arch support strips and 4 spring bars placed along the waist side. The arch bars are more in line with the bone shape of the lumbar spine. The support bars provide 180-degree strong vertical support for the back, and 180-degree support for the waist. They prevent excessive rolling of your muscles, and reduce the pressure in your waist. [Provide the Strongest Support] There are two options for our waist support materials, ABS or stainless steel. You can choose one of them according to your own situation and experience. It provides precise spinal cord reinforcement support, effective pain relief for abnormal muscle compression, and strong lumbar support. [Prevent Back Injuries] Two elastic bands are used for back support, which can increase extra pressure on the waist and prevent the back injuries caused by weight lifting, prolonged standing or sitting, house working, heavy working, etc. Andou product can relieve lumbar muscle strain, lumbar disc herniation, sciatica, scoliosis, etc. [Thoughtful Design] Silicone anti-slip belts are designed on both sides of the waist to prevent the waist support belt from rolling up and slipping off when sitting, bending or doing other activities. Composed of 2 elastic bands, the compression belt is made of nylon hook loop, which has strong adhesion far beyond your expectations. It is made of PVC material that usually used for baby clothes. It can be worn directly on the skin without scratching your skin or damaging your clothes. [Considerate Service] Andou waist support adopts double seams. The quality is strictly controlled. The product is super durable. Andou will provide a refund service for 90-days. Please rest assured to buy. Please feel free to contact us, if there is any question. We will provide 7/24 service.