A flexible polymer sheet/bag/sleeve designed to form a protective water-resistant enclosure around a piece of medical equipment/instrument (e.g., C-arm, surgical laser/camera/microscope, examination table/chair) and/or components (e.g., cables, tubes, headrest). It is intended as a hygienic barrier to protect the equipment/instrument from soiling and/or contamination when used inside, or within the vicinity of, a hygienic area; it may have patient contact, however it is not intended to be introduced into a body cavity (noninvasive). It is neither a dedicated handle cover, device cap nor an ultrasound transducer cover. This is a single-use device.