Work essentials: Designed to help support the back while sitting all day at work. Back support: Get a magnetic back support. Everyday use: Great for everyday wear and an ideal essential for when you need it most. Three sizes: Choose from a medium, large or extra large size. Adjustable length: Support is adjustable to help correct poor posture and fit your body at the best size. Mesh backing: Features a mesh backing for a breathable finish. Magnetic Back Support | Medium | Living Social