Features: Engineered with breathable polyester cotton blend and reinforced PU Leather and PP structure, this invisible back support brace delivers all day comfort while stabilizing spinal during workouts or desk work. Its discreet inner wear designs seamlessly integrates under clothing, offering robust upper lumbar stabilization without compromising styling for professional or casual settings. Ideal for fitness enthusiasts requiring spinal protect during heavy lifts, office workers combating slouching, and anyone needing portable back brace for stress relief. Widely used for fitness workout, strength training, daily study and work, maintain proper alignment through workdays, or prevent injury while commuting, adapts to multiple active lifestyles effortlessly. Machine washable construction withstands repeated use, while light weight engineering (under 8oz) ensures effortlessly packing for gym bags or business trip. Specifications: Component: Polyester Cotton Blend, PU Leather, PP Color: Black Size: See the size chart. Weight: Approx. 133g-154g Package Includes: 1Piece Back Support Brace note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color