Gillette Fusion Replacement Razor Blades feature 5 anti-friction blades for an imperceptible shave. The precision blade on the back reaches the most difficult areas and defines the contours of the face. The lubricating strip fades progressively to indicate a no longer optimal shave. A replacement blade is equivalent to up a month of shaving. The fusion men's replacement razor blades are compatible with all fusion and fusion power razors. Gillette razors, previously called fusion. The ultra-soft protection frame on the blades consists of 15 thinner, more flexible microfins that precede the blades, helping to stretch and prepare the skin before the first blade shaves the first hair, for a deep and comfortable shave.