The Saunders Posture S-Port is light and soft enough to be worn in contact with the skin or, alternatively, over a t-shirt or vest.It can be adjusted to suit the user by means of Velcro-style straps, which impart a mild but continuous pressure that helps to bring the shoulders, neck and spine back into their proper alignment. In so doing, it helps to reduce back pain and encourages the user to adopt a healthy posture that should help to prevent the onset of further problems. The straps are covered with a soft cotton material, which will lie against the skin without nipping or catching. This is the Large version but two smaller models are also available.