Empire Flexible Silicone Skin Case for Samsung Galaxy Rush M830 - Light Blue Specially designed Flexible Silicone Skin Light Blue Case for Samsung Galaxy Rush M830. Made from fully treated silicone. No mixes or blends. Chemically stable, even when impacted by heat or environmental impact. Insoluble in water, corrosion resistant, a virulent insipidity. EMPIRE is a registered trademark with the USPTO.