This product is the 26mm version for women who have been pregnant but have not had a vaginal delivery. Designed in the USA by top gynecologists, FemCap is FDA, CE and NHS approved and designed to be lighter, smaller, more comfortable and safer than diaphragms. FemCap is a cervical cap made of medical grade, hypoallergenic silicone rubber that is used in conjunction with a spermicide as a barrier contraceptive (not supplied). We recommend looking at ContraGel which is a natural, vegan alternative to spermicide. The FemCap comes in a discreet plastic case which resembles a make-up compact to allowing it to be hygienically and conveniently carried. Check out our other Amazon listings for the 22mm version if you have never been pregnant or given birth or the 30mm version if you who have had a vaginal delivery of a full-term baby. No form of contraception can offer 100% protection against pregnancy. Check out Cyclotest Contraceptive Monitor on Amazon to learn how you can increase the efficiency of FemCap by better understanding your fertility window and most fertile days of your cycle. This version of the FemCap is exclusively distributed by Natural Intimacy and RDO Medical in the UK, Spain and Slovenia. Beware of cheap immitations.