Gillette fusion men's replacement razor blades feature 5 anti-friction blades for an unnoticeable shave. Precision blade on the back reaches the toughest areas and defines facial contours. The lubricating strip gradually discolours to indicate a less optimal shave. One replacement blade equals up to one month shave. Fusion men's razor replacement blades are compatible with all fusion and fusion power razors. Gillette razors, formerly called fusion.