Compatible with Galaxy Watch3 45mm, Galaxy Watch 46mm and Gear S3 models. Embossed Calf Leather The Serafil® Prime Collection is made of premium alligator embossed calf leather handcrafted in Italy. The straos ub this collection come with a 100% anti allergic lining and secured with the well-known Greman stitching thread Serafil® to guarantee a perfect hold over time.