Gillette Fusion5 ProGlide men's razor blade refills feature 5 precision blades for incredible comfort (vs. Mach3). With Gillette's thinnest and finest razor blades (first 4 blades, vs. Fusion5), ProGlide allows less tug & pull (vs. Fusion5). The Precision Trimmer on the back is great for hard-to-reach areas such as under the nose and sideburns. One razor blade refill equals up to one month of shaves. Fusion5 Proglide blade refills fit all Fusion5 & Fusion5 Power razors. Formerly known as Fusion. Gillette's thinnest, finest blades (first 4 blades, vs. Fusion5) for less tug and pull (vs. Fusion5) 5 precision blades, helping reduce pressure per blade for a comfortable shave (vs. Mach3) Precision Trimmer on back—great for hard-to-reach areas (nose and sideburns); Enhanced Lubrastrip with more lubricants (vs. Fusion5) Fits All Fusion5 & Fusion5 Power Razors; One razor blade refill equals up to one month of shaves