Gillette Blades Single Fusion 1S Gillette Fusion Mens Razor features FlexBall technology. It responds to contours, getting virtually every hair. The razor comes complete with a Precision Trimmer on the back of the razor, great for edging tough areas such as under the nose and sideburns. One razor blade refill equals up to One men’s razor blade refill equals up to one month of shaves. Fusion5 ProGlide men's r