SureFit™E Force Grey Fitted Stretcher Sheet, 36 x 88 Inch, 1 Case of 50 Gauze Dressings Drapes are a dull blue Otoscope Accessory Drapes are a dull blue color to help reduce glare from operating room lights and provide contrast between drape fabric and reinforced areas for visual definition of critical zones In Polar software or during strength training heart rate can be displayed as a graphical trend * HR based target zones with visual and audible alarm * You can define your target zones for a training session based on heart rate to help define the right intensity Single use prevents cross contamination Quick to deploy when every second counts