Viva Blouse - BlueLux quality, sensual fabric. There is no nylon inside. It does not cause burning, sweating or odor. A silky, breathable fabric. We don't have to worry about size, it can easily fit from size 34 to size 46. Both mothers and daughters of all ages can use it. Whether you wear it by opening the buttons, it is a piece that we can wear in our daily workplaces and even at the beach on the hottest summer days.