The holster includes a solid basically flat rectilinear shape. In one embodiment, a horizontal slot through the thickness of the base receives a strap that is wrapped around the portable device, while a second strap, vertically oriented, is fixed in a keyway in the bottom of the base and threaded through a vertical slot in the thickness of the base and is brought upward over the horizontal strap. In a second embodiment a pair of horizontal straps are set in keyways and are wrapped around a portion of the portable device, holding it in place. All straps having a webbing having one side covered by the hook portion of a hook and loop fastening system and the other side covered by the loop elements of a hook and loop fastening system, allowing opposite sides, or faces, of any single strap to be fastened to itself.