From the manufacturer's website:
Venus razors for women are designed with a woman's body in mind. From handles designed for a comfortable grip to pivoting heads that contour to curves, Venus razors are designed to help reveal touchably smooth skin. Enjoy a close, comfortable shave with Venus Extra Smooth blade refills. These razor refills have 5 blades for a longer lasting shave (vs Venus Smooth 3 bladed razor for women), and a protective ribbon of moisture for incredibly smooth skin. Did you know that any Venus blade refill fits any Venus razor handle? Shave your way without buying a whole new Venus handle.
*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.