JOYKU Batik Sling - Taranaki-BST02- Rose Gold Rings Our signature linens have been individually hand-dyed in a long slow process in a small town called Purwosari in Jawa Timur. These luxurious one-of-a-kind pieces will offer the natural world for you and your baby. All slings have been hand coloured using natural dye from the extraction process on Ceriops Tagal to obtain the soft pink and Indigo for the light blue.