A convertible in which at least one vehicle seat is assigned a windbreak. In an example, an apparatus includes a plurality of optically transparent fabrics. The flexible containment wall is expandable from a collapsed state to define an interior region for receiving at least a portion of a patient therein and providing an impermeable barrier about the portion of the patient, for at least a selected contaminant. Sediment is removed through a drain in the bottom of the tank. And the step of forming the first electroconductor, and the step of forming the third electroconductor are performed simultaneously.