Yves Saint Laurent is the French fashion house founded by Yves Henri Donat Mathieu-Saint-Laurent. The house and designer are often abbreviated as YSL. Laurent became known for his exquisitely-tailored women's suits, and is credited with creating the first women's tuxedo. The first designer to announce his expansion from couture into ready-to-wear, he is credited with making chic ready-to-wear fashions available to the mass market, and for making ready-to-wear a reputable business for designers.
Cosmetics and perfumes have long been included in the designer's offerings.