A garment fabric comprises a fabric support (11) for defining the shape of a garment and having a surface to at least a part of which there is secured a therapeutic fabric layer (14) by means of a flexible adhesive which comprises a herb ingredient, said flexible adhesive at least partially penetrating into each of the fabric support and the therapeutic fabric layer to provide chemical adhesion and a mechanical interlock between said layers. For forming the garment fabric the fabric support and the therapeutic fabric layer each have a layer (15, 16) of adhesive applied thereto prior to bringing the two layers of fabric into contact with one another, with the adhesive material sandwiched therebetween.