Bikini panties are a type of underwear. They are usually worn by women, but can be worn by men as well. They look like a bikini bottom, but are made out of cotton, silk, lace or other fabrics that are used to make underwear. Most common colour: white. Bikini panties are a very popular style of underwear and come in many styles. Bikinis are worn at the hips. The rear coverage of the bikini is not as full as with the brief. Bikini is the most widely worn style among women worldwide.