The mark consists of the words "STERILE" in capital black block letters, and "PROS" in capital white block letters outlined in black, across the top of a badge that has a red crown-shape top, and a dark grey outside border around a red border. The letters in the word "STERILE" progressively increase in size as they span across the top of the badge. The letters "STE" in the word "STERILE" start outside the left edge of the badge. The letters in the word "PROS" progressively decrease in size as they span across the top of the badge, with the letters "OS" ending outside the right edge of the badge. The top quarter of the badge body, below the red crown top to the shoulders of the badge where the badge starts to curve inward is dark grey. The remaining portion of the badge body is grey. The badge contains a white circle outlined in black in its center with a black cross in the center of the circle with four unconnected light grey curved boxes outlined in black bordering the outside of the center circle with the right box containing the letter "P" in white outlined in black, and the left box containing the letter "S" in white outlined in black.