High-performance blades: The Mach3 blades are thinner than a surgeon's scalpel and give you a close shave in a single stroke. A trusted choice, the Mach3 continues to give men around the world a great start to their day. 3 Blades for flexibility: The Mach3 blades are spring-mounted to adjust to different levels of shaving pressure and skin variations. Features MicroFins: The skin guard comprises soft microfins that help to stretch the skin ahead of the first blade. Lubrastrip for smooth shave: The lubrastrip delivers water soluble lubricants to skin for incredible glide. It also fades to white when you are no longer getting an optimal shave. Gillette Mach3 men's razor blade refills feature stronger-than-steel blades that stay sharper longer. With sharper blades, it is engineered to last for 15 comfortable shaves. These Gillette razors feature a lubrication strip that glides to help protect your skin from redness, and a microfin skin guard that stretches the skin, and prepares the hair to be cut. Mach3 men's razor blade refills fit all Mach3 razors. Gillette Mach3 gives a better shave than a new 2-bladed ordinary razor even after 5 weeks.