Cotton | Posture Correction & Back Support: Our back straightener provides dual lumbar supports to align your spine and improve posture instantly. Wear this thoracic back brace for men 1-2 hours daily to build muscle memory, reduce slouching, and promote a straight back. Ideal for back pain relief and achieving a flatter belly | Adjustable & Comfortable Fit: This lifting brace for men and women comes in sizes S-2XL (S: 27.5''-31.5''; M: 31.5''-35.5''; L: 35.5''- 39.5''; XL: 39.5''-43.5''; 2XL: 43.5''-49.5'') . Simply adjust the shoulder pads, fasten the waistband, and secure the elastic straps for a snug fit. The ergonomic lumbar support vest ensures all-day comfort | Pain Relief & Spinal Protection: Combat herniated disc relief and sciatica with our back brace for standing and working. It redistributes pressure, corrects spinal bending, and reduces strain from prolonged sitting or standing | Breathable & Lightweight Design: Made of breathable fabric, this shoulder relief brace keeps you cool while pulling shoulders back. Perfect for office, gym, or daily wear to improve scoliosis posture | Discreet & Versatile Use: Wear this back brace for sciatica invisibly under clothes at work, home, or gym. A must-have for those with back and waist diseases