The bumper provides great protection to the vulnerable edges of the iPhones' front and back covers - while all controls and connections remain accessible. Its slightly protruding profile helps prevent scratches when laying your phone down. This bumper may be combined with commercially available screen protectors.
Shapeways manufactures this design in tough and durable 3d printed polyamide which has a slightly textured surface that gives you great grip on your phone. The polished versions quite a bit smoother. In the white non-polished version, the 3d printed material may get dirty more quickly - but you can just throw this in the dishwasher and it will come out clean and new again.
To put the case on your iPhone, you simply put one corner of the iPhone in the case, then work the next 2 closest corners in. The last corner is tight and requires a nice push.
This case is not guaranteed in any way, it's not an otterbox, so be careful :)