MYBAT Sports Collection TUFF Hybrid Phone Protector Cover for Nokia Lumia 521 - Retail-Packaging - Basketball Designed for the Nokia 521, (Lumia 521) A soft rubberized coating tightly grips to your phone while absorbing shocks and bumps Exterior layer is a hardened shell with a sleek, smooth finish Reinforces vulnerable corners and adds additional side grips for better control of your phone