Opal is a familiar and medium sized yarn printing company managed by its owner Frederic Zwerger, and has about 24 employees.Their worldwide well-known brand is Opal sweater & sock wool, with a common composition of 75% wool / 25% polyamide in different thread sizes (4-ply, 6-ply and 8-ply). Other compositions with polypropylene, cotton, silk or bamboo are available.Their company is based in Hechingen / Germany, and their whole production (printing, washing, steaming and balling) including sales and marketing is based there in one location.