Pants are the most comfortable underwear. They offer a wide range of different fabrics and styles, making them suitable for everything from trousers to dresses.
Using an algorithm, a panty can be pick out any design that would be comfortable for the wearer and what makes it fashionable. This is especially useful as women have different figures (e.g. size 12 instead of size 10) and styles of underwear will suit some more than others.