The Ballistic SG Series case for the HTC Evo 4G 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 protection
• Soft TPU skin
• Impact resistant polycarbonate
• Ballistic corners for ultimate drop protection