To understand why the FemmyCycle doesn’t open completely, you need to understand that the vagina is a flexible organ. It has the muscle to deliver a baby as it expands to many times its size during labor—but when a woman isn’t having a baby, having sex or using a menstrual cup, the vaginal walls are collapsed.

Enter the FemmyCycle. It’s made of soft medical-grade silicone and isn’t designed to “stand up” to the walls of the vagina. Instead, it’s made to conform to the natural shape of the vagina in its semi-collapsed state. The vaginal walls form all the seal you need to prevent leaks. The FemmyCycle’s funnel-shaped lid guides the flow into a small opening leading to the device’s cup. Flow is further drawn out by a mild suction effect that occurs when the FemmyCycle returns to its original shape upon removal.

When the FemmyCycle’s soft, one-size-fits-all* design meets your body’s own unique shape, you get a safe, form-fitting seal that protects underwear, pants, pj’s, bed sheets, bathing suits—whatever!

Learn more at: http://menstrualcupinfo.wordpress.com/about-femmycycle/

*While the FemmyCycle is one of the shortest menstrual cups available at 2.5 inches, it cannot be used by women with low cervices because it will rest alongside the cervix and not collect the menstrual flow. If the distance between your vaginal opening and your cervix is shorter than 2.5 inches, you will not be able to use the FemmyCycle.