InStyle Essentials Women's White Tuxedo Shirt by Bra Size Cotton-blend Shirt uses TrioFit Technology, which sizes shirts by bra size for a form-flattering fit. An extra button over the bustbut hidden under the placketprovides added security, so no more peekaboo. Adds flair to everyday style and easily transitions from day to dinner. Chic, classic and versatile. 97% cotton, 3% spandex