Birkenstock Celina ballet flats in a light, taupe-colored suede. These shoes feature the classic Birkenstock cork-latex footbed designed for comfort, integrated into a sleek, slip-on ballet silhouette. Product Details Brand: Birkenstock. Model: Celina. Style: Slip-on ballet flat with a round toe. Material: Suede leather upper with a leather-lined footbed. Fit: Available in both regular and narrow widths. Origin: Footbed made in Germany