A flexible polymer sheet/bag/sleeve designed to form a protective water-resistant enclosure around a piece of medical equipment (e.g., C-arm, surgical laser/camera/microscope, examination table/chair) and/or equipment components (e.g., cables, tubes, headrest). It is intended as a hygienic barrier to protect the contents from soiling and contamination when used in the vicinity of, or entered into, a hygienic area. It is neither a dedicated handle cover, device cap nor an ultrasound transducer cover. This is a single-use device.