With sharper blades (first 2 blades vs. Sensor3), it is engineered to last 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 hair to be cut. The Mach3 men's razor features a premium handle, expertly balanced and weighted for a great shaving experience. Mach3 manual men's razor fits all Mach3 blade refills.