Depending on the shape of the bra, elastic is a breathable and non-irritating option. Additionally, elastic allows the bra to be thin and lightweight, to make the wearer more comfortable and provide wearability. In other words, a free size bra without elastic is one of the main benefits to provides.
This makes it easy to stock bras without elastic, and in other colors have a natural experience. For addition, many customers would opt to wear bras without elastic, as they are soft and comfortable to the touch.