Specifications

a-Anti-shock case for iphone 4 and 4s
b-3m drop protection
c-Special material and design to absorb impact

The case shown here is a:

1-Silicone case for iphone both iPhone 4 and 4S

2-Soft rubber inside to absorb impact energy

3-Re-enforced outter to reduce crushing and dropping impact 

4-Appropriate opennings for easy accessing of functions 

5-Coated for smoothness and anti-dust. 
6-Packing design aslo offered 

7-Many colors available.