The Ballistic SG Series case for the iPhone 4S, AT&T iPhone 4, or Verizon iPhone 4 offers three layers of protection.
The first and outermost layer is made of soft TPU which will help absorb the shock of a drop. In addition, this first layer is co-molded onto layer number two, which is made of a tough impact resistant polycarbonate.
Last but not least, the third layer, which is the inner-most layer, is made of a soft silicone. This layer also includes Ballistic corners, which means all four corner have extra shock absorption where you need it the most.
Features:
3-layers of protectionSoft TPU skinImpact resistant polycarbonateBallistic corners for ultimate drop protection