Abstract: The invention relates to a customizable wearable top for the treatment of scoliosis, such as Adolescent Idiopathic Scoliosis (AIS), in a person and related methods. In one form there is provided a customizable wearable top to treat scoliosis in a person comprising: a body portion formed from a soft material and being wearable around the upper torso and having a body front and a body back; a strap adjuster on an outward facing surface of the body back, the strap adjuster configured to, or customizable to, mount a first end of one or more straps at a selectable longitudinal position thereon, such that when worn the straps are extendable around at least a portion of a wearer's upper torso to apply a bias force to a treatment site on the person corresponding to the selectable longitudinal position.