Tech21's cases are all lined in some way with the company's D30 impact material (it looks like tightly compacted foam). Its Mesh cases -- Tech21 also makes them for iPhones -- are basically fancy TPU cases. This one has the thin layer of D30 material embedded in the TPU along the inner edges and corners of the case. It comes in a few different colors, but I like the translucent version (pictured here) the best.
Note: Tech21 also makes the Impact Snap case with Cover if you want a folio-style case with some screen protection.