Make sure you are always stocked up on Gillette Fusion ProGlide Flexball Refill Cartridges. Introducing Gillette Fusion ProGlide with FlexBall Technology, the men's razor that responds to contours for Gillette's ultimate shave. The re-engineered Low Cutting Force Blades feature thinner, finer edges with an advanced low-resistance coating to cut effortlessly through hair with less tug and pull than Fusion.