Features: Our Adjustable Back Corrector, featuring breathable polyester and invisible to discreetly combat slouching and provide reliabled back support throughout the day. Crafted from durability, stretchable polyester, this back corrector offering adjustable for a customized fit, available in multiple sizes and classical color to suit various preferences. Designed for adults, teens, professional, and students seeking to alleviating back strain and maintain proper spinal alignment during extended sitting or standing. Perfect for use at home, office, or school, this lightweighted (0.05kg) back support seamlessly integrates into daily routines to promote healthier sitting way. Regular use helps prevent chronic back while enhancing confidence , supported by friendly construction and ergonomic design Specifications: Component: Polyester. Color:Optional adjustable to fit the body. Size: 4 Size Use scenarios: daily office, long-term study, standing work and other scenarios. Size:S Waist Circumference:50-60cm(19.68-23.62inch) Height:125-140cm(49.21-55.12inch) Size:M Waist Circumference:60-70cm(23.62-27.56inch) Height:140-150cm(55.12-59.05inch) Size:L Waist Circumference:70-80cm(27.56-31.50inch) Height:150-165cm(59.05-64.96inch) Size:XL Waist Circumference:80-90cm(31.50-35.43inch) Height:165-180cm(64.96-70.87inch Package Includes: 1PC Beautiful back elastic belt note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.