The 7 Types of Underwear You Should Own

This pair of underwear is modeled after, naturally, bikini bottoms. The waistband sits on the lower side and has very high-cut leg holes. The front and back of the string bikini look like triangles.

When to wear them: Because they provide little coverage, they are less visible underneath clothes and thus can be worn under most anything.

This classic Lively The All-Day Bikini ($15) will be one you always reach for. It comes in four other shades, so you can get them all.