An adaptable backpack (1000) comprising a housing (100), a first comfort plate (200) and a second comfort plate (300). The first comfort plate (200) is having at least one detachable massaging unit (210) and is configured to couple with a pair of opposed extremities (120a) of a back surface (120) of the housing (100) thereby configuring an enclosure. The second comfort plate (300) is disposed within the enclosure such that a portion of the second comfort plate (300) extends through the first comfort plate (200) at the opposed extremities (120b). The second comfort (300) plate is having at least one detachable massaging unit (310) and at least one length adaptable member (330) which is configured to control movement of the second comfort plate (300) along a longitudinal direction within the enclosure. A method of adjusting the detachable massaging units (210, 310) of the adaptable backpack (1000) is also provided.