MPERO IMPACT X Series Kickstand Case for Nokia Lumia 521 - Black / Yellow Built to be tough and durable; Accident prone to large drops and tumbles. Designed tough with a dual layer system of shock absorbing silicone and outer reinforced tough polycarbonate plastic. Locking kickstand feature ideal for watching videos, browsing the web and reading in horizontal or vertical positions. Precise cutouts for all given ports thus keeping device functionality to a maximum. Textured design and silicone materials provide for a more enhanced device grip and tactile feel.