- The Ulla bag is a signature style by SILFEN. This season, she’s back in a exclusive, high-quality calf leather version with silver metal hardware. The 90’s shape beautifully combines an everyday bag with a party look. The single handle is adjustable and make the bag perfect for shoulder bag use. Ulla comes with matching lining and an internal pocket. A must have bag! The leather is made consciously – the material is a bi-product of the meat industry and is dyed with less water consumption.