Senz° Original By Royal Delft Business-Line Umbrella. Senz° by Royal Delft The Royal Dutch Delftware Manufacturer ?De Porceleyne Fles?, established in 1653, is the leading producer of authentic Delft Blue ornamental earthenware. A great example of the high standard traditional Delftware is a tulip vase. Tulips, for which these special vases were created are, even as Blue Delftware, a part of our Dutch cultural heritage. At Senz°, we started our office across the street from Royal Delft a couple of centuries later. We?re very proud to have grown into an icon of the beautiful city of Delft, just like Royal Delft. Together we have created a wonderful design to celebrate our city. A design where tradition, innovation and the love for Delft all come together. Polyester.