The Presidio GRIP cases have a polycarbonate shell and IMPACTIUM rubber layer that are molded together for two layers of protection in a one-piece case. Ridges of IMPACTIUM material on the inside perimeter compress on impact to absorb and disperse shock. Description • Two layers of protection with the IMPACTIUM Shock Barrier • 10-foot drop tested • Protective no-slip grip • Lifetime warranty What's in the box 1 X Speck Case