a secure adjustable orthotic device having multiple brace portions and one or more locking mechanisms . one locking mechanism is a level moving buckle including a top member , a locking member and a base member . the locking member is adapted to engage and disengage an inserted strap in response to the longitudinal movement of the top member relative to the base member . the level moving buckle inhibits accidental longitudinal movement of the inserted strap when the top member is in a locked position .