The anti-panty-line thong: It’s a good idea to have more than one of these. No one likes to have eye-catching panty lines. And don’t forget, thongs or g-strings tend to be pretty sexy to the opposite sex. Fitted pants, shorts or skirts will look many times better with this thong underneath. This is more about impulse than brand—go with what is comfortable rather than choosing by brand.

The rainy day panties: Sometimes you need to take a break from sexy. This is a pair of panties that is comfortable to wear, preferably cotton, made of a thin material, without seams on the edges that are too tight. They should give you the same feeling your favorite t-shirt does. Target offers a terrific cotton panty that doesn’t tug or pull in the least and comes in all sizes and colors, the Gilligan & O’Malley Ultimate panty.

The in-the-nude panties: White skirts, white pants or lightweight pastel colored bottoms can reveal your underwear, especially if they are bright or loud colors or fabrics. That’s why it’s always good to have a nude colored pair of panties so that they blend with the color of your skin, rather sticking out like a sore thumb.