Empire Flexible Silicone Skin Hot Pink Case for HTC Windows Phone 8X Specially designed Flexible Silicone Skin Hot Pink Case for HTC Windows Phone 8X. 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.