Your Guide to Every Type of Bra Worth Owning, From Sweat-Wicking to Multiway

What it does: As unpleasing as a panty line, seeing the texture of a lacy bra (or even the outline of a nipple) can ruin an otherwise seamless look. As its name promises, this bra has smooth, contoured cups made of thin foam to give you a predetermined shape to wear under thin fabrics like T-shirt material.

When to wear it: You'll know. As much as you love that frilly bra with the tiny beaded embellishments, the minute you toss on that silk blouse or slinky dress, you'll know you have to go with something smoother.

When to replace it: Next to the bralette, you might find this to be your go-to undergarment, so plan to replace it every six months after regular wear.

Shop: Natori Pure Luxe Underwire T-Shirt Bra ($44-$74, originally $74). Third Love 24/7 Classic T-Shirt Bra ($74). Cuup The Scoop ($23-$78, originally $49-$78).