A wearable apparatus for wearing on a head of a user, the apparatus has a band assembly comprising an outer band member comprising outer band ends joined by a curved outer band portion of a curve generally shaped to correspond to the user's forehead； a flexible inner band member comprising inner band ends joined by a curved inner band portion of a curve generally shaped to correspond to the user's forehead, the inner band member is attached to the outer band member at least by each inner band end respectively attached to a respective one of the outer band ends； at least one brainwave sensor disposed inwardly along the curved inner band portion to provide a flexible conductive surface； and a deformable attachment that connects the flexible inner band member to the outer band, the deformable attachment allowing the inner band to conform to the user's forehead shape, the deformable attachment having a biasing component to urge the at the at least one brainwave sensor towards the user's forehead when worn by the user.
