"Then she starts weaving it, but as the sign on the door says, it is not for sale.
"It would be like commercialising the flight of an eagle," Vigo says.
"The byssus is the soul of the sea. It is sacred."
She gives the fabric to people who come to her for help. It may be a couple who have decided to marry or who have married, a woman who wants a child, or one who has recently become pregnant. Byssus is believed to bring good fortune and fertility.
"Before it was emperors [who wore byssus], now it is young women and newlywed couples," Vigo says. "I weave for outcasts, the poor, people in need.""