There is disclosed a mobility aid for use by a user having a lower body amputation site. The mobility aid includes a lower body exoskeleton (LBE). The LBE has a pelvic support structure and a first leg and a second leg. Each of the first and second legs are movably coupled to the pelvic support structure, wherein at least the first and second legs are selectively actuable to move the lower body exoskeleton relative to a surface on which the mobility aid is positioned. The LBE also includes a carrier selectively positionable with respect to the lower body exoskeleton and, which in use, supports the user at or about an amputation site; and a harness system configured to, when in use, secure the user to the lower body exoskeleton.