The material is really very robust and protects the Kindle as well as possible. The casing is well-made, solid and is expected to absorb the occasional crash. The Kindle Touch starts relatively easily scratch a, an envelope is therefore a must - at least on the road and in similar situations.
But the dimensions are (based on the Kindle Touch) extremely scarce ... You have quite a pull and tug so the Kindle fits at the first times in the shell. A few more millimeters in width and in length would not have hurt. Neoprene is the time so slightly - would be handy ...