An apparatus for creating a sterile sitting environment is provided. The apparatus includes a front, a side, and the back. The front and the back are connected by the side so as to create an internal volume bounded by the front, the back, and the side, which internal volume is accessible via an opening. The front of the cover can be larger than the back of the cover, and the back of the cover can have a fastener located around the perimeter of the back. The fastener can be used to secure the cover in a second position, which second position can retain the front and the sides of the cover within an internal volume defined by the back of the cover.