Abstract: A portable mat apparatus including a lower holding pan containing at least one centrally located opening, a self draining pan for nesting within said lower holding pan, and at least two grated mats located above said self draining pan, wherein a user can stand on said grated mats to change his or her clothing. Embodiments of the claimed subject matter include apparatuses, systems and methods having a self draining pan with one or more compartmentalized storage spaces, handles, cargo nets, net notches, drain holes, leash lock loops for securing the self draining pan, one or more plastic containers each of which is removably attached to the one or more walls of the self draining pan, one or more cargo x components formed from at least two elastic hook and loop fastener straps each of which is removably attached to one or more walls of the self draining pan, and one or more elastocket components.