Str8-n-Up retrains your muscles and mind of what proper form is so that slouching can be prevented. Slouching can lead to tension headaches, back and neck pains, reduced lung capacity, gastrointestinal problems and other health issues that can be prevented. Wear Str8-n-Up only 30 minutes a day and you will start feeling and knowing the difference in your posture. Its great for office workers, video gamers, yoga and fitness enthusiasts and use to destress after long hours of driving or traveling to help stretch your shoulder muscles and put you back into proper form. It"s gentle, easy to use and stylish enough to wear over your clothing. The band is made from a 4-way, breathable and durable fabric that can be washed every day. Comes in 5 sizes: XS, S, M, L and XL. Note: See special sizing/fitting image to order correct size.