This is a shell with ABS material for your raspberry pi 3, the color is generally black, it has three parts, the top is the hollow cover, the middle is used to support and accommodate the raspberry pi bracket, last one is bottom with a lot of cooling holes and heating pads.

If you want to protect your Pi and put it into your pocket, there will not be a better alternative than working with it. Comes with three heat sinks to help cool your Pi