What is Sézane famous for?

Can you tell me, what exactly is Sézane renowned for? I've heard whispers of their impeccable fashion sense and their dedication to sustainability, but I'm eager to know more about what truly sets this brand apart. Is it their exquisite craftsmanship, their innovative designs, or perhaps their ability to blend timeless elegance with modern sensibilities? I'm intrigued and would love to gain a deeper understanding of what makes Sézane so celebrated within the fashion industry.