The Gillette Venus Swirl Razor Blades have been designed to glide around tricky areas, like knees and ankles, with 5 contour razor blades that individually adjust to every single curve. The Gillette Venus Swirl is Gillette's best blade yet, being 6 x more flexible than Venus original razor blades, and each cartridge provides up to a month of shaves (based on shaving twice a week). Pack contains 3 x cartridges.Venus Swirl refills fit all Venus razor handles except Simply Venus. Contains functional sharp edge. Keep out of reach of children. Always read instructions before use.