5 Types of Underwear You Should Own — and Where to Buy Them

Lively The All-Day Bikini ($15)

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: This classic bikini bottom will be one you always reach for. It comes in four other shades, so you can get them all. Because they provide little coverage, they are less visible underneath clothes and thus can be worn under most anything.