1 Cartridge, 1 Razor5 blades, spaced closer together, help to supply a closer and more comfortable shave than MACH3.The Fusion handle has been redesigned vs. MACH3 to provide better control in wet conditions.The lubrastrip delivers water soluble lubricants to the skin for incredible glide.Soft microfins help to stretch the skin ahead of the first blade.The single blade built into the back of the cartridge allows to shave tricky places like sideburns and under the nose.