Abstract: Methods of attaching a weft hair extension apparatus to the scalp hair of a person are disclosed. An illustrated method comprises: passing strands of scalp hair through at least one of a plurality of beads that are affixed to or integral with a seam of the weft hair extension apparatus; passing strands of scalp hair and stands of extension hair through at least one of a plurality of deformable locking beads; and, deforming the at least one of the plurality of deformable locking beads such that the strands of scalp hair and the strands of extension hair passed therethrough are then held captive therein. Weft hair extension apparatus are also disclosed.