You lost it. You smashed it. The fargin' dog ate it. We don't care. We don't wanna know. Some people can live without it. You're are not that person. Works for all Banjo Brothers Backpacks: 01150, 01152, 05009 and 01153. The Banjo Brothers Backpack Replacement Waist Strap. Get. Off. My. Lawn. Now.