Abstract: A mast holder for a roof rack is described. Such mast holder includes three flexible straps which interact to provide reliable securance to a rack cross bar. It also includes a cradle having a rest of a configuration which conforms to the exterior shape of a mast. The cradle is of a material which is sufficiently pliable to provide such conformation. The cradle is also formed with support structure for the rest by coextrusion. The support structure is configured to interact with the rest to provide the necessary structural support that it needs.