Gillette Mach 3 Cartridges is a revolutionary new triple-blade shaving system for the closest shave ever in fewer strokes - with less irritation. Please note, image is for illustration purposes. Gillette Mach 3 Cartridges - 3 Blades specially positioned to extend gradually closer to your beard, to shave you progressively closer in a single stroke. So close there is less need to re-shave, which means less irritation. Patented DLC comfort edges - each blade has a patented DLC comfort edge, so Mach3 glides effortlessly across your face. And Mach3 has an advanced Indicator lubricating strip with a blue stripe that fades away when you are no longer getting the optimal Mach3 shaving experience.