MyBat Asmyna NOKIA 830 (Lumia 830) FullStar Protector Cover - Retail Packaging - Black The TotalDefense line is well-known for providing three layers of protection including a soft silicone interior hardened shell and a decorative lattice-patterned exterior! Studded in rhinestones this is a wonderful cover and complements many fashion styles. A shock-absorbent band of silicone protects the entire perimeter of the case and improves grip.