A carrying case including a main body housing providing a storage space, an opening to the storage space, a movable part or flap, a partially-detachable loop portion, and at least one fastening means. The partially-detachable loop portion has a first end that is fixedly-attached to the main body housing, and a second end that is attachable/detachable to the main body housing by the fastening means. In a fully-attached state, the fastening means holds the second end of the partially-detachable loop portion to an outer surface of the main body housing until the at least one fastening means is released, the releasing allowing a partially-detachable loop portion to move to a partially-attached state where the second end freely moves.