Spigen Slim Armor Case The Slim Armor case is designed for ultimate protection while maintaining its minimalistic look and feel. The TPU (Thermoplastic Polyurethane) inner lining is soft but delivers great button response and impact protection and shock absorption with its strategically designed interior. The outer polycarbonate midsection has a matte finish coating that offers great grip and feel. Product Features: Slim, form-fitted design. Two toned colors with a metallic finish. TPU case wrapped in polycarbonate outer midsection for extra protection.