Avyden Frost Series TPU Case for Samsung Galaxy S IV / S4 (Pink) Samsung Galaxy S IV S4 SIV / GT-I9500 Case Compatible for All Carriers. SLIM-Fit design lets your showcase your smartphone by keeping it sleek. Frosted finish gives your Galaxy S4 a smooth and comfortable feel. Material: Durable and flexible Thermoplastic Polyrtethane (TPU). Gives your phone amazing protection for a price that can't be beat!