Bralettes have less structure than other bras and are usually sized small, medium and large. They're ideal when you just want a little support and modesty with lots of comfort, and many women wear them for sleeping or relaxing around the house. Wireless bralettes are usually made from a seamless stretchy knit, with wide underbands for support. All of this comfort doesn't mean you have to sacrifice style: there are pretty stretch lace styles, bandeaus, mesh styles and plunge bralettes that add a sexy, feminine touch. Some brands go up to size 5X, which means that women of all shapes and sizes can enjoy the pure comfort of an unstructured bra.