The two main features of the ShirtConvert are:
1. Neck Support – to fit into your neck curve. It is also padded with high quality foam.
2. Lumbar Support – is the holy grail feature of the ShirtConvert. It fits your lumbar spine like a glove fits your hand. It provides its maximum support to the lumbar spine very much like the arch support in a good running shoes as it lifts and support your arch and prevent it from collapsing during the motion of sit ups. You have to try it to believe it. Your back will definitely thank you for finally providing it with the needed support.