Gillette Fusion5 ProGlide mens razor blade refills feature five precision blades for incredible comfort (vs. Mach3). With Gillettes thinnest and finest razor blades (first four blades, vs. Fusion5), ProGlide allows less tug and 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.