The Back on Track T-Shirt is ideal for wearing if one has pain/complaints in the shoulder region and even in the neck and back. In order to achieve optimal effects, skin contact is important, so if one has problems with one's back then it should not hang too loosely. If one has lumbar back problems then it is better to use the back brace. An alternative is to sleep in the T-shirt as that provides good skin contact. If it's the shoulders one has problems with then the T-shirt may be looser fitting as the T-shirt always has direct contact with the shoulders. Comes in a range of sizes (Extra Small, Small, Medium, Large, Extra Large, XX Large and XXX Large).