O&M Halyard Inc Orthopedic Drape Orthopedic Bar Drape 60 W X 100 L Inch Sterile (203898_CS) 18/CSWith a clear boundary established by a drape, the surgical team can concentrate on the task at hand without worrying about contamination from nonsterile areas, leading to smoother and faster operations. Drape is blue because blue provides a high contrast against the red color of blood and tissues, making it easier for orthopedic surgeons to see what they are doing.