I'm a woman "of a certain age" to put it delicately. I have birthed some babies, including my 9 1/2 lb son.
Even with lots of Kegel exercises, a full bladder and a sneeze can leave me with wet panties. And not in a good way.
Pantiliners for such events are fine, but not ideal. They get pretty pricey over time. When I saw an ad for Icon Pee-Proof Underwear, I decided to give them a go (pun not intended, but it works). The crotch of each pair has a special interior lining that can hold several teaspoons of urine without odor or leakage. They can be machine washed and dried without any problems.
After several wearings, I can report that these undies work as promised. I wear the bikini cut (see photo at right), and I tried one thong. They also come in a hip hugger and high-waist version. Colors are limited to black and beige in my size and styles, but what else do we really need? They do seem to stretch out a bit as washed, so you may need to go down a size.
This company also makes Thinx, the period-proof underwear. I don't need those (the certain age thing again), but I bet they work. The site is full of urine puns and "whizdom." And all their products help support the Fistula Foundation, providing surgical repair of obstetrical fistulas. A fistula is a connection between stuctures, in this case the things that empty out down there. Women in countries without modern obstetrical care often suffer genitourinary damage leading to urinary or fecal incontinence afterwards. Fistulas make my teensy bit of urinary leakage seem like such a first world problem...
I still have some other undies at this point, but they will be replaced by IconUndies as they age and go to panty-heaven. It's fun to be pad-free!